Yes! While Texas sheet cake tastes great warm, it can also be served at room temperature, so it's perfect as a make-ahead dessert. Just be sure to cover it well so that it doesn’t dry out. You don’t even need to remove the cake from the pan, just wrap it all in plastic wrap and you’re good to go. I find that this sheet cake is good for up to about 3 days when covered this way. You can also transfer the sliced cake pieces to an airtight container for longer storage to keep them fresh.