Homemade Oreos Ingredients For the cookies: 1 cup (2 sticks) unsalted butter, softened 1 cup granulated sugar 1 egg 1 teaspoon pure vanilla extract 2 cups all purpose flour 3/4 cup dutch process cocoa powder 1 1/2 teaspoons baking powder 1 teaspoon salt For the filling: 1/2 cup (1 stick) unsalted butter, softened 2