When a big birthday or another special occasion ... Are Sheet Cakes My Only Costco Cake Option? Sheet cakes have a cult following, but the Costco bakery has many other sweet options.

When you are ordering a cake at Costco, consider requesting this one simple addition that will take the stress out of cutting equal pieces for your guests.

Costco's half-sheet cakes are available in vanilla ... and getting that unappealing crusty texture. Keep the cake in pieces as big as possible to avoid multiple cuts and to preserve moisture.