1.PREHEAT oven to 425°F. Mix 1/2 cup of the milk, sour cream and 3 Tbsp. sugar in large bowl with wire whisk. Stir in baking mix until just blended. Spread evenly into greased 9-inch round cake pan. Bake 12 to 15 min. or until top is golden brown. Remove from pan; cool completely on wire rack.