Showing posts with label kitchen chemistry. Show all posts
Showing posts with label kitchen chemistry. Show all posts

February 15, 2024

Fun With Purple Sweet Potatoes

Last year my purple sweet potatoes did really well. These made up the bulk of my sweet potato harvest, and we've been enjoying them as oven fries or cubed and roasted with turnips or sometimes other veggies. The other day, I decided to try them in a sweet potato pie for our weekend dessert. 

I peeled a couple of them, cut them each into several large chunks, and simmered until tender. Then I ran them through the blender.

I thought the resulting puree was a gorgeous color. 

To make the pie, I used my no-dairy Sweet Potato Honey Pie recipe. The addition of the golden honey and bright yellow egg yolks changed the color a little, but it still baked up as a distinctly purple pie.

Or maybe that's more of a purplish brown, but one would never know the difference in a blind-folded taste test. It was a yummy sweet potato pie.

I had some puree left over, so the following Sunday, I made sweet potato pancakes. Except these were nowhere near purple! 

My guess is that the pH of the batter changed the color. For my baked goods, I always use a baking soda + acid combination from How To Bake Without Baking Powder. For these, it was baking soda + sour cream which gave me beautifully fluffy green pancakes! They were delicious with a little maple syrup. Very fun. 

Anyone else experimenting with something different?

January 31, 2022

Book Giveaway!

This week, I'm teaming up with Permies.com to giveaway four paperback copies of my How To Bake Without Baking Powder.

Between now and Friday, you can enter to win your very own copy. The "rules" are simple:

  1. Sign-in or sign-up for Permies.com
  2. Sign up for their Daily-ish email.
  3. Head on over to Permies cooking forum with your questions, answers, and ideas on the concept of baking without baking powder. All new posts in the forum count as one entry. More posts means more entries! (And a secret: quality counts. An interesting question or informative post counts more towards winning than a "me too" or "I agree" post.)
Permies will announce the winners sometime on Saturday. Watch the Daily-ish for the announcement.

So, come on over to Permies! I'd love to chat with you about the many alternatives for baking without baking powder.

Book Giveaway! © January 2022 

March 7, 2016

"How To Bake Without Baking Powder" Winners & Another In the How-To Series

Winners of my "How To Bake Without Baking Powder" eBook giveaway are:

Peg Cherre
Dawn Clo
Deborah Harvey
Jackie P. Neal
Ashley A.
Carmen N.

Congratulations! If your blogger profile has an email address, I'll be contacting you today. If it doesn't, you will need to contact me at 5acresandadream at mail dot com. The free code will be good at Smashwords, where you can download a copy in the format of your choice. Regular price is $2.99 at Smashwords or Amazon.

Also I'd like to announce my newest addition to The Little Series of Homestead How-Tos


It's one of a couple others I've had in the works, and is now available at Smashwords and Amazon for 99 cents.

For a list of all volumes in the series, click here. And stay tuned for announcements for more additions to the series plus another giveaway in the future. 


March 1, 2016

"How To Bake Without Baking Powder"

I'm am pleased to finally announce that this is out


It is my most ambitious book in The Little Series of Homestead How-Tos so far, especially because I included a recipe section with 54 non-baking powder recipes. It's available in either paperback or eBook in epub, mobi (Kindle), pdf, rtf, lrf, pdb, txt, and html formats. You can find where it's available at my book website. 

This is not a reprint of my "Baking With Wood Ash?" blog series. I reference that series, but the information here is so much more than that.

Chapters:
  • What is Baking Powder? 
  • Baking Soda (The Alkali) 
  • Cream of Tartar (The Acid) 
  • Common Kitchen Substitutes for Cream of Tartar 
  • How To Make Sour Milk 
  • Buttermilk: Cultured Versus Traditional 
  • How To Make Cultured Buttermilk 
  • Cocoa Powder: Natural Versus Dutch 
  • Not So Common Kitchen Substitutes for Cream of Tartar 
  • How To Make Sourdough Starter 
  • Are There Substitutes for Baking Soda? 
  • Baker's Ammonia (Hartshorn) 
  • Pre-Baking Soda Leaveners: Potash, Pearlash, & Saleratus 
  • Ash Water 
  • Other Historical Leaveners 
  • What About Eggs?
  • The Little Things Matter

Also includes:
  • Chart of Baking Powder Substitutes 
  • The pH of Various Foods
  • 54 modern and historical recipes 
  • Glossary 
  • Resources

I have to admit that I keep a copy handy myself. I refer to the charts and recipes frequently! 


February 1, 2016

Savory Cheese Biscuits

Here's another successful "Baking Without Baking Powder" experiment. This one uses pickle juice with baking soda for the leavening.

Savory Cheese Biscuits


2 cups flour
1 & 1/2 tsp baking soda
1/2 tsp salt
1/2 cup rendered chicken fat (or palm shortening)
1 cup milk (for drop biscuits - for rolled & cut biscuits use 2/3 C milk)
1 tbsp dill pickle juice
1 cup shredded cheese
1/2 tsp dry mustard powder
1/4 tsp black pepper

Mix flour, soda, salt, mustard, and pepper. Cut shortening into flour mixture. Add milk and pickle juice, and mix enough to moisten all ingredients. Fold in shredded cheese and drop (or roll and cut) onto greased baking sheet. Bake at 425°F (218°C) for 10-12 minutes or until golden brown.

These rose beautifully too!

I used homemade pickle juice and my own goat cheese. Yummy!

Savory Cheese Biscuits © February 2016 by

January 27, 2016

"Coffee Cakes"

My baking with wood ash experiments are only a small part of the content of the eBook I've been working on, although it all revolves around the creation of carbon dioxide bubbles. I've had a lot of fun experimenting with this and would like to share some of my successful recipes. This one is for "Coffee Cakes." Coffee was my kitchen acid and baking soda was the alkali. The "cakes" refers to them as cupcakes, although their low sugar content makes them good as muffins too.

You can see that I got a beautiful rise on this one!

"Coffee Cakes"

1/2 C sugar
1/4 C softened butter
1 egg
1 and 3/4 C flour
1 tsp baking soda
1/2 tsp salt
1 tsp cinnamon
2/3 C strong, regular coffee

Cream sugar and butter, add egg and mix well. Mix dry ingredients and add to creamed mixture, alternating with coffee. Stir enough to moisten all ingredients. Fill muffin cups 2/3 full and bake for 12 minutes at 425°F (218°C).

Frost for cupcakes if desired, or eat plain for muffins. Makes 1 dozen.

"Coffee Cakes" © January 2016 by

January 23, 2016

Baking With Wood Ash? (Part 3: The Results!)

When my ash water/vinegar experiments were a bust (see Part 2), I felt like I was at a crossroads. I could continue researching the chemistry of the process, or I could get on with my baking experiments. I opted to do some baking!

In preparing the ash water for baking I made a few changes from the way I did my test batches. This time I increased the amount of ashes to make a 1:1 solution of equal parts hardwood ashes and water. Also, I followed Farmer Liz's and Jake's suggestions to use hot water. According to The Caveman Chemist, hot water should extract about 225% more potassium carbonate from the ashes (which is what causes the leavening action by reacting with the acid to make carbon dioxide bubbles). I let the solution sit overnight and then strained out the ashes the following morning.

For the baking part of my experiment I decided to make drop biscuits. I used one of my standard recipes but quartered the amounts. My base recipe was
  • 1/2 cup flour
  • 1/8 tsp salt
  • 1/8 cup (2 tbsp) palm shortening
  • 1/4 cup (4 tbsp) milk
  • 1/2 tsp vinegar
  • 1/4 tsp baking soda

I used white flour and white vinegar in all the recipes, I only changed the baking soda in my experimental samples (details below). I made four batches with four biscuits each and baked them in my toaster oven at 425°F (218°C) for 8-10 minutes. Here's how they looked after baking.

Samples #1-4 - top (above) and side view (below)
From left: base recipe (#1) with 1/4 tsp baking soda and 1/2 tsp vinegar 
Next (#2): I replaced 2 tbsp milk with 2 tbsp ash water plus 1/2 tsp vinegar 
3rd: replaced milk completely with 1/4 cup ash water plus 1/2 tsp vinegar 
Right (#4): 1 tsp dry sifted wood ash with 1/2 tsp vinegar

Next I broke a sample of each biscuit open.

They are in the same order as the above caption. 

Obviously the baking soda and vinegar biscuit on the left rose the best. #2 (2nd from left) with 2 tbsp ash water rose well, but 4 tbsp (#3) less so. The same was true for the dry ash (#4 on the right), however, they both still rose! Since I added more ash water to batch #3, I might have suspected a higher rise. What I think is that it would have benefited from more acid (vinegar) and I would have gotten a better rise. Ditto for the dry ash biscuit on the left - more vinegar to make more carbon dioxide bubbles. If I were to continue experimenting, that would be my next step.

When they were cool, I sliced them open. This gives us a better idea of texture and color.

Left: baking soda biscuit. Right: #2, the 2 tbsp ash water biscuit.

Left: #3, the 4 tbsp ash water biscuit. Right: #4, the dry wood ash biscuit.

One thing I noticed immediately was that all three batches with wood ash were not completely dry inside. In other words, they could have baked a little longer.

Color? I expected the dry ash biscuit to be more grayish than it turned out, but I don't find the color objectionable at all. What do you think?

How did they taste? [Drumroll................] They tasted like biscuits. No odd flavor or bitter or soapy aftertaste, which apparently is a problem when baking with pearlash (which is more concentrated because it is purified and refined). Batch #3, in which the milk was replaced with ash water, actually had a pretzel flavor. Pretzels are dipped in lye water before baking to give them their characteristic shiny pretzel brown (known as the Maillard reaction), but apparently the lye water adds a characteristic pretzel flavor as well. If you take a second look at the photo of #3 above, you can see that the surface of that biscuit is somewhat shiny like a pretzel.

My next test was to have Dan try them. He liked them too!

So, back to the original question. Can hard wood ash be used in place of baking soda for baking quick breads? Absolutely. The ash water method took a little advance preparation and had less impact of biscuit color, but in a pinch hardwood ash could be used too, although I would recommend a very fine sieve to prevent random grittiness.

Anyone game? If you do try making your own ash water, keep in mind that results can vary because the chemical composition of hardwood ash varies according to wood type and burning temperature. I would recommend a small test baking with each new batch of hardwood ash.

Lastly, here are links for part of my bibliography plus some other related stuff:

Now available: How To Bake Without Baking Powder: modern and historical alternatives for light and tasty baked goods. Includes 54 non-baking powder recipes. Click here for chapter titles and where to buy.

© Jan. 2016 by Leigh at 

January 12, 2016

Baking with Wood Ash? (Part 2)

In Part One I asked the question, "Can I somehow use hardwood ash as a substitute for baking soda?" We looked at the history of baking soda, including it's early precursors made from hardwood ashes. The earliest recipes refer to the somewhat refined products of potash and pearlash. But how would that equate to sifted hardwood ash? Unknown. The chemical composition of hardwood ash is highly variable, depending on tree type and burning temperature. Still, for a little kitchen chemistry experiment, I figured I'd just have a go and see what I got.

To test my ashes, I made ash water by stirring the ashes into one-quarter cup of filtered water and letting it sit overnight.

Making ash water with hardwood ashes collected from the wood stove.

I made three solutions: one with one tablespoon of wood ash, one with two, and the last with three tablespoons. These were stirred into 1/4 cup filtered tap water. The insoluble components sank to the bottom and the next day I poured off the clear water containing the soluble components that I wanted.

My first step was to test each of these with litmus paper.

Left to right: 1 tbsp, 2 tbsp, and 3 tbsp.
I judged the results to be 10, 11, & 12

This kind of pH testing is approximate but still helpful. As you can see in the caption, I found the solutions to be progressively more alkaline.

The next step was to see how each of these would react with an acid - in this case white vinegar. I started with a "control" of 1 tablespoon baking soda in 1/4 cup vinegar.

My control - reaction was immediate.

For my test subjects I used one-quarter cup vinegar and 1 tablespoon of ash water. Here are my results.

Solution #1 (with 1 tbsp wood ash) - no reaction.

Solution #2 (with 2 tbsp wood ash) - no reaction.

Solution #3 (with 3 tbsp wood ash) - no reaction.

Surprised, I dumped the remains of solution #3 into the vinegar and, again, no reaction. I had been expecting at least some reaction so I was puzzled. I did one more vinegar experiment, this time adding 1 tablespoon dry hardwood ash.

Solution #4 - wood ash in white vinegar - reaction. 

The reaction was not as vigorous as the control, but it was a fair one nonetheless. The murky color, however, doesn't seem to recommend straight wood ash for baking, does it? Still, it got me pondering.

Now, I have to mention that chemistry was my worst subject in both high school and university. That being said, my conclusion was that somehow, combining the ash water and vinegar did not produce carbon dioxide gas, which is needed to make baked good rise. My theory was confirmed in a comment in Part 1 by Jake from The Homestead Laboratory (if you haven't visited his blog, by all means do. Lot's of really good stuff there.) He wrote:
"Passing water through wood ashes extracts both potassium carbonate and potassium hydroxide (and other potassium salts, and the sodium salts, too, but there's fewer of those). I don't think most articles consider that there is a significant amount of potassium hydroxide, but that's what reacts with carbon dioxide to make potassium bicarbonate. Potassium carbonate wouldn't react with carbon dioxide; it's already "fully carbonated." :-)"
Potassium carbonate is pearlash, which I mentioned in Part 1. The lack of reaction would explain why the historical recipes I've seen do not call for an accompanying acid. The reaction must therefore be heat activated.

So my preliminary experiments did not turn out as I expected, and left me wondering about those references to ash water I told you about in Part 1. What's next? This post is probably long enough, so I'll answer that in Part 3. Click here to continue.

Now available: How To Bake Without Baking Powder: modern and historical alternatives for light and tasty baked goods. Includes 54 non-baking powder recipes. Click here for more information and where to buy.

January 7, 2016

Baking With Wood Ash? (Part 1)

Now that Critter Tales is behind me, I'm turning my hand to working on more volumes for my The Little Series of Homestead How-Tos eBook series. Yes, I know that sounds like it contradicts my New Year goal of going hard-copy for information I don't want to lose. From a writers' perspective, however, eBooks (like my blog) give me a chance to get something published, get feedback, and edit them later. My eventual goal (Good Lord willing and the creeks don't rise) is to compile the series into a paperback. The one I'm working on at present is "How To Bake Without Baking Powder."

When we think of baking without commercial baking powder, recipes for homemade baking powder come to mind. So do old-fashioned recipes calling for saleratus and sour milk or buttermilk. All of these work on the same chemical principle: an acid + a base = carbon dioxide bubbles which cause a batter to rise. While doing my research, I ran across an interesting statement in a Wikipedia article.

"In times past, when chemically manufactured baking soda was not available, "ash water" was used instead. Ashes from hardwood trees contain carbonates and bicarbonate salts, which can be extracted with water. This approach became obsolete with the availability of purified baking soda."

How could I not resist following up on that?

I know ashes in one's food probably sounds gross, but consider that wood ashes have been used historically in cooking worldwide: in Mexico for nixtamalization of corn for masa, in the Philippines as Lihia, in Nigerian cuisine as Kaun or Akaun (Cooking Potash), in traditional Scandinavian foods like lutefisk (lye fish), for making olives in the Mediterranean, in old European recipes for Greek and Polish cookies, as Pottasche for browning German pretzels and lye rolls, in gingerbread, in Chinese Century eggs and noodles. Native Americans also used wood ash to make hominy. Cooking with ash is considered a trendy gourmet technique, and think of ash-coated cheeses. Or how about this paleo recipe for steak cooked on a coal bed?

All of that might not convince you, but the prepper in me is always running in the background asking, "How would I do that if I couldn't buy or barter for it?" In this case, "How would I bake quickbreads if I couldn't get baking soda? Could I somehow use hardwood ashes if I had to?"

There were no references for that tidbit at Wikipedia, so I had to do a little digging on my own.  In his blog post  "Where does soda bread come from?," Joe Pastry mentions that Native Americans used ashes to "lighten" their grain cakes. Susan Slack ("Pearl Ash – A forerunner to Baking Soda") further states that the Hopi made a thin batter of blue corn meal, wood ash, and water to make piki, their staple bread.

In terms of actual recipes, the earliest references I could find did not call for wood ash proper, but rather for potash. Potash is a product which is refined from hardwood ash. It was in use in American cookery in the 1700s. Example proportions are found in an old "American Potash Cakes" recipe in The Domestic Encyclopedia, Or, A Dictionary Of Facts And Useful Knowledge, Chiefly Applicable To Rural & Domestic Economy: With An Appendix, ... And The Veterinary And Culinary Arts... (published in 1802): a half-teaspoon potash dissolved in a half-teacupful of water to 1 pound flour (about 4 cups) and a quarter pound of butter (1/2 cup).

In Martha Washington's Booke of Cookery and Booke of Sweetmeats, transcriber Karen Hess states, "that American women were routinely using this chemical (made at home of wood ash) in their baking," (page 201). She is referring to pearl ash (or pearlash), but gives no clue as to how it was made at home.

Pearlash (potassium carbonate) is a purified form of potash. It is sometimes found in recipes of the American Civil War era and before. The modern leavener of the time, however, was saleratus (Latin for aerated salt). Chemists had discovered that by exposing potassium carbonate (pearlash) to carbon dioxide gas, they could make potassium bicarbonate. It was twice as potent as pearlash, with one teaspoon of saleratus being equivalent to 1-1/4 teaspoons of baking soda.

In the mid-1800s a purer form came onto the market - sodium bicarbonate. Originally developed in Europe, the first American manufacturers of sodium bicarbonate also called it saleratus. Later it became known as baking soda.

Okay, so the history is interesting, but how can I, as a DIYer, use that information? By experimenting! More on that soon. (Click here to read Part 2.)

Now available: How To Bake Without Baking Powder: modern and historical alternatives for light and tasty baked goods. Includes 54 non-baking powder recipes. Click here for more information and where to buy.