1 (4 oz.) pkg. Jello instant pudding
1/4 c. confectioners sugar
1 c. cold milk
1 (8 oz.) container thawed Cool Whip

Combine pudding mix, sugar, and milk into small bowl. Beat slowly with rotary beater at lowest speed until well blended, about 1 minute. Fold in Cool Whip. Spread on cake at once. Store frosted cake in refrigerator.