Updated October 16, 2026
Quick answer
Yes. Costco sheet cakes and 10-inch rounds have a perishable mousse filling, so keep them refrigerated and don’t leave them out more than 2 hours (1 hour above 90°F). Take the cake out about an hour before serving. Refrigerated, it lasts 3–4 days; frozen, up to 3 months.
Yes
Refrigerate
2 hrs
Max out
3–4 days
Fridge
3 months
Freezer
Storage Times for Costco Cakes & Desserts
| Item | Room temp | Fridge | Freezer |
|---|---|---|---|
| Sheet cake / 10″ round | Max 2 hours | 3–4 days | Up to 3 months |
| Tuxedo mousse cake | Max 2 hours | 3–4 days | 2 months |
| Cheesecake | Max 2 hours | 5 days | 2 months |
| Tres leches | Max 2 hours | 3–4 days | Not ideal |
| Pumpkin / pecan pie | Max 2 hours | 3–4 days | 1–2 months |
| Apple pie | Up to 2 days | 4–5 days | 3 months |
| Cupcakes | 1 day | 2–3 days | 2 months |
| Muffins | 2–3 days | Not needed | 3 months |
How to Freeze a Costco Cake
- Chill uncovered for 1 hour so the frosting firms up
- Wrap in two layers of plastic wrap, then foil
- Freeze slices separately for easy servings
- Thaw overnight in the fridge, still wrapped
Costco Cake Storage FAQ
Do Costco sheet cakes need to be refrigerated?
Yes, because of the mousse filling. Don’t leave them out more than 2 hours.
How long can a Costco cake sit out?
About 2 hours at room temperature, or 1 hour in hot weather.
How long does a Costco cake last in the fridge?
3–4 days, covered.
Can you freeze a Costco cake?
Yes, for up to 3 months, well wrapped.
Related: Sheet cake · All prices · Cheesecake
Costco-Cakes.com is an independent guide, not affiliated with or endorsed by Costco Wholesale Corporation. Prices and availability vary by warehouse. Food safety times follow general USDA guidance for perishable desserts.