The peanut brittle cookie recipe uses crushed peanut brittle, peanut butter, oats, and chocolate to make this unique and memorable cookie!   Ingredients 1 stick (1/2 cup) salted butter, softened 1/4 cup shortening 1 cup packed dark brown sugar 1/2 teaspoon baking powder 1/4 teaspoon baking soda 1 egg 1 teaspoon vanilla extract 1 1/4 […]