McDonald's birthday cake, which is available in select locations nationwide in either chocolate or vanilla, comes in two ...

Costco's half-sheet cakes are available in vanilla or chocolate and can be custom-decorated by the store's bakery staff for your next birthday, retirement party, or anniversary. Those in the know ...

If you were to set your half-sheet cake on a scale ... Costco keeps its bakery section full of ready-made sheet cakes, some plain, some with birthday messages, and—around the holidays—some ...

but you can also use a half sheet pan if you’d rather–just reduce the baking time by about 15 minutes. A quick marshmallow frosting is piled on top of the cake before serving. All it needs is ...