OREO Surprise Cake

Heat oven to 350°F. Cover bottoms of 3 (8-inch) round pans with parchment; spray with cooking spray.

Chop 8 cookies. Prepare cake batter as directed on package; stir in chopped cookies. Pour evenly into prepared pans.

Bake 15 to 18 min. or until toothpick inserted in centers comes out clean. Cool 10 min. Remove cakes from pans to wire racks; cool completely.

Trim rounded tops off cake layers if necessary to make layers level. Discard trimmings or reserve for snacking.

Microwave cream and chocolate in microwaveable bowl on HIGH 1 min. or until chocolate is completely melted and mixture is well blended, stirring every 30 sec. Cool slightly.

Meanwhile, reserve 1/4 cup frosting for later use. Place 1 cake layer on serving plate; spread with half of the remaining frosting. Cut 3-inch round from center of 1 of the remaining cake layers; reserve center cutout for later use. Place cake layer (with center piece removed) on cake layer on plate; spread with remaining frosting. Fill hole with sprinkles. Cover with remaining cake layer.

Spread 1 Tbsp. chocolate mixture onto reserved center cake cutout; set aside. Spread remaining chocolate mixture onto top of cake. Place cutout on top of cake. Decorate with reserved frosting and remaining cookies.