Preparation

• Heat oven to 350°F.
• Line 15x10x1-inch pan with foil, with ends of foil extending over sides. Prepare brownie batter as directed on package; spread onto bottom of prepared pan. Top with cookies; press lightly into batter to secure.
• Bake 12 to 15 min. or until toothpick inserted in center comes out with fudgy crumbs. (Do not overbake.) Cool completely.
• Use foil handles to remove brownie from pan. Remove and discard foil. Cut brownie crosswise in half. Spread ice cream onto bottom side of one brownie half; cover with remaining brownie half, top side up. Wrap in foil. Freeze 3 hours or until firm.
• Cut filled brownie into 16 triangles; coat one edge of each triangle with sprinkles.
• Freeze 1 to 2 hours or until firm.