Costco Vs Walmart: Which Bakery Sells The Cheapest Cake In 2026?

We've pitted Costco and Sam's Club bakery sections against each other to determine which one is the most affordable, and we've considered 7 different grocery stores on our hunt to find the best chocolate cake. But what about grocery giant Walmart? We've put these two stores' bakery sections to the test to find out which store sells the cheapest cake in 2026 — and by technicality, the winner is Walmart.

It should be noted that Costco and Walmart operate on completely different business models. While Costco is notorious for its low prices and big-box store practices, Walmart more closely resembles a typical supermarket. Instead of stocking up and buying bulk, shoppers at Walmart can find everyday grocery items for reasonable prices in everyday quantities. And while both stores' bakery sections carry similar items — think cookies, muffins, pastries, and cakes — Walmart technically wins as the cheaper option when it comes to purchasing a cake to enjoy casually. But when it comes to feeding a crowd, it should be noted that Costco is a great place to pick up a celebratory cake to satisfy everyone at a birthday party or celebratory office function. 

Overall, it really depends on the occasion, and how many mouths you have to feed. If you just need a sweet treat for a few people, head to Walmart. Otherwise, we suggest Costco as an affordable option when it comes to bigger sheet and layer cakes that can easily feed over ten people.

Walmart's bakery section houses a variety of affordable sweets. But its cheapest frosted cake, a 5-inch two-layer round, comes in at just $6.42. That's around 40 cents an ounce, or a little over a dollar a slice. According to its posting on Walmart's website, this cake can feed 6 people; and there's a variety of flavors to pick from at this price point, including vanilla, chocolate, and carrot cake. We should point out that, while we are just comparing the classic cake here to even the playing field, Walmart carries individual cake slices for under $4 and mini cupcakes under $5. So if you are searching for the cheapest cake for a small function or simply as a sugary pick-me-up, Walmart is the way to go.

Still, we shouldn't count out Costco altogether, because Kirkland bakeries provide a number of affordable options when it comes to larger cakes. In a previous piece, we measured up Costco's sheet cake against other competitors, and all pale in comparison on both price and taste (though flavor options are limited). For a half sheet cake at this wholesale giant, it'll cost you a total of $31.77 — and that includes both custom and premade varieties in chocolate or vanilla. At Walmart, however, half sheets will run you $42.96 (you can choose from chocolate, white, yellow, or marble cake flavors, though). A 10-inch round at Walmart is priced anywhere from $29.98 to $34.98, depending on decorations, while Costco's 10-inch round layer cakes are priced at $20.42. So while Walmart is technically the cheaper option, Costco may just be the place to go for those looking to minimize cost for a bigger gathering.