Grease a 7 inch diameter bowl (large enough to hold 1/2 gallon ice cream). Grease the bowl with vegetables cooking spray, butter. Let ice cream soften until it is workable. Pack tightly in the bowl. Return bowl to freezer until it hardens.
When ready to assemble, beat egg whites until foamy. Add tartar and whip until stiff. Gently fold in powdered sugar a little at a time.
Place frozen layer cake on a plate slightly larger than the cake. Unmold the ice cream centering it on the cake. Do not trim the cake. Frost cake and ice cream with meringue, covering completely.
Bake in preheated at 450 degrees for 6-7 minutes until meringue peaks are golden.
Store in freezer until serving time. Baked Alaska is delicious plain, or you could use fudge, strawberry, or your favorite topping.
