Dramatic baked Alaska with ice cream, sponge cake, and toasted meringue is a show-stopping family celebration dessert. This impressive creation combines frozen and flamed elements in one stunning presentation.
Line a 1.5-quart bowl with plastic wrap and firmly pack vanilla ice cream into the bowl. Freeze until solid, at least 4 hours or overnight.
Place the prepared sponge cake on a parchment-lined baking sheet. Unmold the ice cream dome and set it on top of the cake layer. Return both to the freezer for 30 minutes to firm.
In a clean, dry mixing bowl, beat egg whites with cream of tartar and salt on medium speed until soft peaks form, about 2–3 minutes.
Gradually add granulated sugar, 2 tablespoons at a time, beating on high until glossy, stiff peaks form. Beat in the vanilla extract.
Working quickly, spread or pipe the meringue evenly over the entire ice cream and cake, making sure no gaps remain. Use a spatula or the back of a spoon to create decorative swirls.
Preheat oven to 500°F (260°C). Bake the assembled Alaska for about 3–5 minutes, watching carefully until the meringue is golden and lightly toasted. Alternatively, use a kitchen torch for extra control.
Transfer to a serving platter, slice with a hot serrated knife, and serve immediately for the dramatic contrast of cold ice cream and warm meringue.