Before baking powder: the ashes that once rose breads, rendered from hearth to hearth, potash and pearlash.

Potash Leavening — Historical Baking with Ashes (Before Baking Powder)

Update (August 27, 2025): Expanded with historical timeline, safety notes, modern substitutions, and FAQ. Cross-linked to our measurement guides.

What did bakers use before baking powder?

Long before handy tins of baking powder, cooks relied on alkalis from wood ash—known as potash and its refined form pearlash—to aerate quick breads, gingerbreads, and biscuits. When combined with an acid (vinegar, sour milk, molasses), potash releases bubbles that lighten doughs. It’s clever chemistry with humble origins.

Kitchen Adventures – Japanese Basics -Dashi (だし, 出汁) or Dashijiru (出し汁) & Furikake (ふりかけ)

Dashi is the foundation of Japanese food and without a good dashi broth, many of your dishes will be flat and lacking the unique umami flavor that is expected in Japanese food.  Unlike stock which requires a multitude of ingredients and can take hours to make, a good Dashi is made from a small number of ingredients and can be ready in as little as 20 minutes.

It is believed that Dashi was first produced as early as the 7th century, and many texts refer to it.  It was in common use in the Edo period. The recipe that was used at Crown Tournament can be traced directly to the Ryōri Monogatari.

4. DASHI だし (BASIC STOCK)

Chip katsuo into good size pieces, and when you have 1 shō worth, add 1 shō 5 gō of water and simmer. Sip to test and should remove the katsuo when it matches your taste. Too sweet is no good. The dashi may be boiled a second time and used.

Japanese recipes are usually measured by volume not weight.  The system uses “gō ” and “shō”. 

1 gō is 180 ml, and 10 gō is 1 shō. The traditional big bottle of sake is 1 shō (1800 ml) and the half size is 5 gō (900 ml). I must confess that MOST of my cooking for feast was measured in an empty sake bottle for feast. However, if you are looking for easier measurements see the table below. 

Metric Equivalents

1 Gô (合) = 180ml = 6 ounces

1 Shô or Masu (升) = 1.804 liters = 60.8 ounces

1 To (斗) = 18.04 liters = 608 ounces = 4.75 gallons

1 Koku (石) = 180.4 liters = 47 gallons

Unit Conversions

1 Shô or Masu (升) = 10 gô (合)

1 To (斗) = 10 shô or masu (升)

1 Hyô (俵) = 1 "bale" or "bag" of rice = 4 to (斗)

1 Koku (石) = 10 to (斗) = 2.5 hyô (俵)

More Conversions!

1 shô = 1.804 Liter = 1.906 quarts = 60.8 ounces = 7 3/4 cups

1 gô = 180ml = 6.08652 ounces = 3/4 cup

4. DASHI だし (BASIC STOCK)

Chip katsuo (bonito) into good size pieces, and when you have 1 shō worth, add 1 shō 5 gō of water and simmer. Sip to test and should remove the katsuo when it matches your taste. Too sweet is no good. The dashi may be boiled a second time and used. 

Interpreted Recipe

~ 4 pounds bonito
90.8 ounces of water

Add your bonito to your water and simmer until the broth matches your taste.  

In deference to modern taste, you may also want to add kombu (dried kelp) to your dashi.  

Dashi II

Yield: 6 cups =  12 servings at  ½ cup per serving

6 cups cold water
1 ounce dried kombu (kelp)
~1 cup dried katsuboshi (dried bonito)

Bring water and kombu just to a boil in a large pot over high heat. Remove from heat and remove kombu. Sprinkle bonito over liquid; let stand 3 minutes and, if necessary, stir to make bonito sink. Pour through a cheesecloth lined sieve into a bowl.

Dashi III (Overnight Dashi)

4 cups water
10 x 10 cm square dried kombu (kelp)
1 cup of katsuobushi (bonito flake)

Pour the water into a container. Place the kelp and bonito flake into the container. Leave it over night (about 8 hours or more). Strain the kelp and bonito flake.

Storing Dashi Stock

Use straight away or leave in fridge for 1 day or in the freezer for about 3 weeks.

Bonus Recipe

What do you do with the left over bonito and kelp? Create furikake seasoning to go over your rice. 

Furikake (ふりかけ) is a dried Japanese seasoning which is sprinkled on top of cooked rice. Ingredients include a combination of dried fish flakes, dried egg, dried cod eggs, bonito flakes, sesame seeds, chopped seaweed and other flavorings.

Servings: 1 cup

½ oz reserved kombu
1 oz reserved katsuobushi slightly wet
1 Tbsp toasted white sesame seed
2 tsp toasted black sesame seed

Nori Seaweed
1 tsp sugar (add more to your taste)
2 tsp soy sauce
¼ tsp salt (kosher or sea salt; use half if using table salt) (add more to your taste)

Gather all the ingredients. Make sure the kombu and katsuobushi are well drained. Cut kombu into small pieces. Put kombu and katsuobushi in a saucepan and cook on medium-low heat until katsuobushi becomes dry and separated from each other. Cook on medium-low heat until the liquid is completely evaporated. Cook on medium-low heat until the liquid is completely evaporated.

Transfer the furikake to a tray or plate and let cool. Once it’s cooled, you can add toasted/roasted sesame seeds and nori seaweed. You can break katsuobushi into smaller pieces if you prefer.Put in a mason jar or airtight container and enjoy sprinkling over steamed rice or a seasoning for fish, chicken, soup, popcorn or whatever you fancy.  

This seasoning can be frozen up to a month, or refrigerated up to two weeks. 

Kitchen Adventures – Crown Tournament 10/19/2019 (えだまめ - Edamame (Soybeans))

The earliest documentation of soy foods in Japan can be found in the Taihō Ritsuryō (Taiho Law Codes), written by Emperor Monmu in 701 CE.  This document also references "misho" the precursor to miso which appears later in 901 CE in the Sandai Jitsuroku. The first mention of Edamame, is found in a letter written by a Buddhist Saint to one of the parishioners of his temple, thanking him for the green vegetable soybeans in pods in 1275.

This dish was very simple to prepare.  Simply steam your soybeans until they become tender and sprinkle with salt.

Kitchen Adventures – Crown Tournament 10/19/2019 (Tsuru no shiru 鶴の汁 (Crane Broth))

Tsuru no shiru 鶴の汁 (Crane Broth)
Picture Courtesy of Avelyn Grene (Kristen Lynn)

The samurai considered Crane soup a prized dish and a luxury. By the sixteenth century, it was a necessary served at formal warrior banquets. The recipe for the dish that was served in Iemetsu’s banquet closely resembles a recipe published in the Guide to Meals for the Tea Ceremony (Cha no yu kondate shinan, 1676), written by Endō Genkan (n.d.). Commoners were prohibited from eating crane and other fowl at banquets, it was a dish reserved for the elite.

The dish that was served at Crown Tournament is my interpretation from the Ryōri Monogatari. according to Endō Genkan, Crane soup could be prepared with crane that was fresh or crane that had been preserved in salt.  The most important aspect of the preparation was to ensure that each bowl of soup contained one or two pieces of the leg meat of the crane.

Tsuru no shiru 鶴の汁 (Crane Broth)

Add the bones [of the crane] to broth and decoct. Prepare with sashi-miso. The seasoning of the sashi are important. For tsuma, something seasonal is good. It is good to put in any number of mushrooms. Whenever you make it, put aside the sinew. For suikuchi: wasabi and yuzu. Alternatively, from the start you can even prepare in nakamiso. You can even use a suimono.

Crane Broth

1 ½ pounds Peking or Muscovy duck breast or skin on, bone in chicken thighs
Salt and pepper
2 garlic cloves, minced
2 teaspoons grated ginger
1 tablespoon mirin (sweet rice vinegar)
1 tablespoon sugar
1 tablespoon tamari or light soy sauce
8 ounces soba (buckwheat noodles) - Note: For feast shiritaki noodles were used
8 ounces sugar snap peas or snow peas, trimmed
8 cups water
2 medium leeks, white and tender green part, diced, about 2 cups
1/4 cup white miso or to taste - Note: Miso was omitted at feast
5 ounces baby spinach, about 4 cups
A few basil or shiso leaves, julienned

Place whole duck, or chicken into a pot and add ginger and garlic. Cover with water and bring to a boil, reduce to simmer and simmer until meat is tender. Allow to cool over night.

Next day remove the fat from the broth. Remove meat from the bones keeping it in large chunks. Reheat broth to just under a boil, add water, mirin, sugar, and tamari. Taste broth and adjust for salt if necessary. Add miso to broth right before serving.

If using soba noodles, cook according to package directions in a separate pot. Shiritake noodles should be rinsed before serving.

Bring a small pot of salted water to boil. Add snap peas, mushrooms and leeks and simmer 1 minute, then drain and refresh with cool water. Leave at room temperature.

To serve, reheat broth to just under a boil. Dilute miso with a little hot broth and whisk into soup. Layer noodles, meat, peas, leeks and spinach into a bowl and ladle hot broth over it. Top with shiso or basil.


References

“Food and Fantasy in Early Modern Japan.” Google Books, Google, https://books.google.com/books?id=_m6g_8Aw_IsC&pg=PA115&lpg=PA115&dq=Commoners+were+prohibited+from+eating+crane+and+other+fowl+at+banquets,+it+was+a+dish+reserved+for+the+elite.&source=bl&ots=5ulOnQbw98&sig=ACfU3U2qRbwtQs1Ys3JJshTELMJEBCEy-w&hl=en&sa=X&ved=2ahUKEwjEkPfs1t3mAhXULc0KHfRrBcoQ6AEwAHoECAoQAQ#v=snippet&q=crane soup&f=false.

C, Eric, and Rath. “EARLY MODERN JAPAN 2008 Banquets Against Boredom: Towards Understanding (Samurai) Cuisine in Early Modern Japan.” Academia.edu - Share Research, https://www.academia.edu/6397005/EARLY_MODERN_JAPAN_2008_Banquets_Against_Boredom_Towards_Understanding_Samurai_Cuisine_in_Early_Modern_Japan.