Ice Cream Bomb
Spread the praline ice cream evenly over the bottom and the sides, about 3 inches of the coffee ice cream. Place the bowl in the freezer and freeze until firm, about 30 minutes. Fill the center of the bowl with the chocolate ice cream. Place the circle of sponge cake on top of the filled bowl. Cover the bowl tightly with plastic wrap and place in the freezer. Freeze the mold until firm, about 2 hours.