Heat oven to 350°F. Mix 1/4 cup butter and cream cheese. Stir in flour, 1/4 cup powdered sugar, 2 tablespoons cocoa and the vanilla. Divide into 24 pieces. Press in bottom and side of 24 ungreased small muffin cups, 1 3/4x1 inch. Mix filling ingredients. Spoon 2 teaspoons into each.