Reese's Stuffed Peanut Butter Cookies Ingredients Cookies 1 and 1/4 cups (160g) all-purpose flour 1/2 teaspoon baking soda 1/4 teaspoon salt 1/2 cup (115g) unsalted butter, softened to room temperature 1/2 cup (103g) dark brown sugar (or light brown) 1/4 cup (50g) granulated sugar 1 large egg, at room temperature 3/4 cup (185g) creamy peanut