peanut butter miso cookies

Some time ago, I mentioned adding miso to peanut butter cookies on twitter. I received a number of requests for the recipe/ratios, which I promised to post. 

You wouldn't know that it's miso that makes these cookies special unless you were privy, but you'll notice the difference in the rounded flavor. Sweets that are nuanced with savory and salty are always a winning combination in my book.

peanut butter miso cookies

makes 24 7.5cm/3" cookies 

106g unsalted butter, at room temperature
130g peanut butter
40g shiro miso (light miso)
88g dark brown sugar (preferably muscavado)
80g granulated sugar  
8g glucose
53g egg
5g baking soda
10g boiling water
175g all-purpose flour

Place the butter, peanut butter, miso, brown sugar, granulated sugar, and glucose in a mixer bowl. Beat the ingredients with the paddle attachment at medium speed until light and creamy. Add the egg and beat just until incorporated. In a small bowl, dissolve the baking soda in the boiling water and add to the mixer bowl along with the flour. Mix on low speed for 2 minutes until all of the ingredients are well combined.
Preheat oven to 163C/325F, or 157C/315F if using convection. Using a 3.80cm/1.5" scoop, lay out level scoops of dough on a silpat or parchment-lined baking sheet, leaving about 5cm/2" between cookies to allow for spreading. Chill cookies for 20 minutes to firm dough. Scoops of raw dough can also be frozen for future cookie cravings, then packed into ziplocks. Remove cookies from refrigerator and press with the tines of a fork in a cross-hatch pattern, if desired. Bake for 10 minutes for a softer cookie, or 12 for a crisper cookie.

Miso and peanut butter are so similar in appearance and texture that I'm surprised I haven't made the connection before. In addition to improving a classic cookie, the peanut butter-miso connection captured my imagination for another product: peanut miso.

Most people don't realize that peanuts are in fact legumes. Culinarily, we use them like nuts, but botanically they belong to the plant family Leguminosae, or Fabaceae, and are more closely related to peas and beans. This connection begs the question: if miso is made from soybeans, can it also be made from other beans?

I do know that [I] can't make miso from citrus rinds, though I gave it a good try. During the 10 month fermentation, I had hopes of transforming all sorts of products by fermenting with Aspergillus oryzae(koji mold), the fungus used in the production of miso, soy sauce, and sake. In my haste to make a new product, I failed to follow two fundamental tenets: understanding of product and process, and groundwork. Had I started with a time-honored traditional soybean miso, I would've had a map for when it was on course and where it veered off. Had I done my research, I would have understood that pectin-rich citrus pericarps were not an inviting environment for the enzymatic reaction that koji forms with protein.

Still, I'm hopeful and excited about roasted peanut miso.
And spicy black bean miso.
And fermented hummus.
But first— I'll start with the basics.