Sourdough Peanut Butter Cookies

1 cup sourdough starter
1 cup peanut butter
1 cup butter
1 cup brown sugar
2 eggs
1 teaspoon vanilla extract
2 cups flour, plus more if needed to make formable dough
1 teaspoon baking powder
1 teaspoon baking soda
1/2 teaspoon salt

Mix sourdough starter, peanut butter, butter, brown sugar, eggs and vanilla extract. Mix flour, baking powder, baking soda and salt together. Add to sourdough mixture, adding a little more flour if needed to form balls. Form into small balls, place on ungreased cookie sheet and press down with fork. Bake at 350 degrees F for 12 to 15 minutes.

Yields 36 cookies.