PREHEAT oven to 350º F. Paper-line 30 muffin cups.
COMBINE cake mix, pudding mix, sour cream, eggs, vegetable oil and water in large mixer bowl; beat on low speed just until blended. Beat on medium speed for 2 minutes. Stir in 1 cup morsels. Fill each cup 2/3 full.
BAKE for 25 to 28 minutes or until wooden pick inserted in center comes out clean. Cool in pans for 10 minutes; remove to wire racks to cool completely. Frost; decorate with remaining morsels.