Bake 15 minutes or until set and bottoms are light golden brown. Remove from cookie sheets to cooling racks. Cool completely, about 30 minutes. In small bowl, beat remaining 1/4 cup butter, 1 cup powdered sugar, 1/4 teaspoon almond extract and the milk with electric mixer on medium speed until smooth. For each sandwich cookie, spread about 1/2 teaspoon filling on bottom of 1 cookie; top with second cookie, bottom side down, to form ball.