Do you need a cake for a birthday party or large gathering? Costco sells a wide variety of custom cakes and even premade cakes! The Costco bakery offers a few different cake options, including round cakes and sheet cakes, of course, at an amazing Costco price.
If you need a high quality and tasty cake for your next party or event, don’t overlook the cakes from Costco’s bakery. They are easy to order, delicious, and will save you money.
In this guide, I cover all the Costco cake options, including the custom cakes and some of their decorated premade cakes. I provide the pricing for all of the cakes that Costco sells, including the round cakes and the sheet cakes.
I also walk you through the entire Costco custom cake ordering process and provide all pertinent information along with pro tips for designing your perfect cake. You’ll learn everything there is to know about ordering, customizing, and enjoying special occasion cakes from the Costco bakery.
Costco sells a variety of different cakes, but we’ll start with the two custom cake options: the round cake and sheet cake.
You can order both cakes from the “Mystery Cake Box” (we’ll talk more about this later) and you can customize the cakes with simple text or images.
The Costco round cake is 10” in diameter, serves 16 people and comes in either chocolate or vanilla flavor. The round cake is perfect for smaller gatherings such as intimate parties or festivities.
Costco’s sheet cake is the larger of two Costco cakes and also only comes in vanilla flavor or chocolate flavor. The giant Costco sheet cake serves 48 people and is the better pick for larger parties or gatherings.
Each 10” Costco round cake will serve about 16 people. For reference and to give everyone a much clearer idea of what these slice sizes look like, I’ve included a helpful graphic from The Cake Flake.
Although the graphic doesn’t actually show a 16-serving slice to compare, it does show a 12-serving slice as well as a 22-serving slice. A 16-serving size slice falls between these two slices with each slice weighing about 4 ounces. To me, this seems to be a reasonably sized cut that will stretch the cake to feed 16 people.
Costco’s bakes the sheet cakes to serve approximately 48 people. For the sheet cake, the assumed serving size is a 2” by 2” squares, weighing approximately 90 grams or 3.17 ounces. This is roughly 20% smaller than the 4-ounce slices of Costco’s round cakes.
A single serving of Costco’s sheet cake is on the smaller side for most people. Your guests may want more than one piece at your party.
With that in mind, it’s smart to buy servings for more than just the number of attendees. Stock up so there are seconds to go around.
Costco’s sheet cakes measure in at 12″ x 16″ (192 square inches) and feed about 48 guests. It’s worth noting this is technically a half-sheet cake as full-sheet cakes are typically 18″ x 26″ (468 square inches).
At 192 total square inches and 48 servings, each slice of Costco sheet cake works out to around 4 square inches, or a 2″ x 2″ piece.
There are a lot of great things about Costco and their bakery, but there are some shortcomings when it comes to their cake offerings. One of them is that the customized Costco cakes are limited to just two flavors – white or chocolate.
The chocolate Costco cake is filled with chocolate mousse filling and covered in a chocolate frosting.
The white flavor cake (vanilla) is filled with vanilla cheesecake mousse filling and covered in white frosting. I’m assuming Costco chooses to call it white cake rather than vanilla because it isn’t true vanilla flavor, but something similar.
Costco doesn’t disappoint in price when it comes to their special custom cakes. Costco’s 10-inch round cake serves 16 people and costs only $15.99. The Costco half-sheet cake is an even better deal, feeding 48 people for just $24.99.
Like almost everything else in the world, Costco has raised prices on their cakes. The current price for the 10” round cake is $15.99, up from $12.99 in 2022, and the sheet cake sells for $24.99, up from $19.99.
While price increases are always unfortunate, Costco’s cake stills are very fairly priced and offer some amazing value.
Sam’s Club sells their 10” round cake for $16.98, or about $1 more than Costco’s round cake price. Sam’s Club’s half sheet cakes sell for $18.98, which is about $6 cheaper than the Costco sheet cake price.
So it looks like Sam’s Club may be the best option if you are solely shopping on price.
Compared to regular grocery stores, Costco cakes are a steal. For example, Publix sells an 8” round cake for $20.99 and a half-sheet cake for $45.99.
These prices are typical of your standard grocery store and pale in comparison to Costco’s cake prices. You will pay nearly double for a cake that may or may not even be of the same quality tier as Costco’s cake.
Costco is an absolutely fantastic company, but their custom cake order system has fallen behind the times.
All orders Custom Costco cake orders must be placed at the in-store cake order kiosk using paper forms. Just like ordering a Costco party platter, there are no online or app ordering options available.
To place an order for a custom cake, head to the Costco bakery (usually located at the back of the warehouse), and find the cake order kiosk. Each Costco location has them in slightly different locations, but the kiosks will be located somewhere in the Bakery.
The Cake kiosk located in the bakery is your one-stop shop for Costco cakes. The kiosk has the order forms, available cake design options, size and flavor choices, pricing info, and order submission instructions.
When you locate the kiosk, you will find the paper Special Cake Order Form. The Costco cake order form is quite basic and rather straightforward to fill out. These are the choices you will have to make on the special cake order form:
Sample Costco Cake Order Form" width="1024" height="768" />
Costco does request 1 day notice for cake orders and don’t forget to write in your phone number at the top of the order form page.
When completed, submit the form in the order form slot.
Feel free to print and download the Costco Cake Order Form by clicking here. This particular order form may not be the same exact copy that your local Costco has or uses in their bakery, but I have yet to hear from anybody about Costco not accepting this printed special order cake form.
You will also notice a calendar on the cake order kiosk with all the days that Costco is closed during the year. The holidays that Costco is closed for are the following:
Costco sells holiday cakes and custom designs for many occasions. However, if it is one of the above listed holidays, they are closed on the actual holiday day.
So you’ll need to pick up your special order holiday cake at least one day before the holiday.
Don’t expect a confirmation or even acknowledgement of your custom Costco cake order. And it may not the best system, but you will have to trust that your cake will be there on pick up day.
Head to Costco’s bakery and find the special order cake rack near the cake ordering kiosk. This rack holds all the custom cakes for the day, with each one attached to its order sheet. Search through the cake rack until you find your custom cake.
In the late afternoons or evenings, once most cakes have been picked up for the day, Costco bakery staff will often return any remaining cakes to the fridge in the bakery department. If you’re picking up a cake late in the day, you may need to ask a bakery employee for assistance in retrieving your cake from the fridge.
If you are picking up your cake order on a slower day (usually weekdays), Costco may not use the special cake rack. In that case, you’ll need to get the attention of one of the bakery employees and let them know you’re there to pick up your custom cake order.
