Peanut Butter Cookies with Sourdough Discard Flax Egg Replacer
These classic peanut butter cookies call for a combination of flaxseed meal and a small amount of sourdough discard to replace an egg
Servings: 24 cookies
Equipment
- 1 hand mixer or stand mixer
Ingredients
- 3 tablespoons unfed sourdough discard, 100 percent hydration *(see note) straight from the refrigerator
- 1 tablespoon ground flaxseed brown or golden, finely ground
- 1 cup all-purpose flour
- ½ teaspoon baking powder
- ½ teaspoon baking soda
- ¼ teaspoon salt omit if using salted peanut butter
- ½ cup butter, softened 1 stick, dairy or vegan
- ½ cup unsalted peanut butter
- ½ cup granulated sugar
- ½ cup packed brown sugar golden or dark
- ½ teaspoon vanilla
Instructions
- Make a sourdough discard flax egg by combining the sourdough discard and flaxseed meal in a small bowl. Set aside to thicken for 10 to 15 minutes. Preheat the oven to 375°F.
- In a medium-size bowl, sift together the flour, baking powder, baking soda and salt.
- In a large bowl, beat together the softened butter and peanut butter with a hand mixer on high speed until creamy, about a minute. Add the sugars and beat until creamy. Beat in the sourdough discard flax egg and vanilla.
- Mix the dry ingredients into the wet ingredients. If necessary, use a clean hand to incorporate the remaining flour. If desired, cover the bowl with a plate and let sit on the counter to ferment for 4 to 6 hours.
- Roll the dough into 1-inch balls and place 2 inches apart on ungreased cookie sheets. Flatten with the tines of a fork to make a criss-cross pattern. Bake for 10 to 12 minutes or until the bottoms have slightly browned, rotating the trays halfway through baking.
- Allow to cool on the cookie sheets for 2 minutes. Transfer to a cooling rack to completely cool. Store in a container for a week or the freezer for six months.
Notes
This recipe calls for discard from a 100 percent hydration starter. That means the starter contains equal amounts of flour and water by weight. If your starter is, say, at 85 percent hydration, the dough may be slightly drier. If the dough is dry and does not come together, add a splash of liquid (water or milk of choice).