Last Updated on March 11, 2026 by Kimberly Stroh

Who doesn’t love the classic flavor of a Hershey’s Milk Chocolate Bar? I grew up enjoying Hershey’s chocolate, and just thinking about those little mini bars melting in my mouth still makes me crave one. If you’re a fan like I am, you have to try this incredible Hershey Bar Chocolate Sheet Cake recipe. The cake is made with Hershey’s cocoa powder, then topped with a rich chocolate frosting and six Hershey bars for the ultimate chocolate lover’s dessert.

Why We Love This Hershey Bar Chocolate Sheet Cake

If we get invited to an event where I need to bring a dessert, I’m always picking a sheet cake. They’re great for feeding a crowd. This chocolate cake is baked in a 9×13-inch baking dish, which will typically serve 12 people. I’ll make it for church gatherings, cookouts, and birthday parties. Sheet cakes are so much easier than layer cakes because you aren’t stressing over multiple layers. Once you make a few, and your family approves, it’s hard to go back to the fancy layer cakes!

Looking for even more great chocolate cake recipes? Here are the chocolate cakes that my readers love:

• Boozy Chocolate Kahlua Cake
• Original Coca-Cola Cake Recipe
• CrockPot Chocolate Cake

Kitchen Tools You’ll Need To Make This Cake

If you don’t already own a 9×13-inch baking dish, it’s an absolutely must-have for your kitchen. I also use a piping bag to decorate the cake after you’ve added the frosting. It’s a simple technique that uses a medium piping bag with a star tip. Feel free to omit this part if you don’t have the tools to do so. You can pipe the cake for an added touch of fancy or skip it all together.

Hershey Bar Chocolate Sheet Cake Ingredients:

• Eggs
• Buttermilk
• Canola Oil
• Fresh Brewed Coffee
• Baking Soda
• Baking Powder
• Hershey Cocoa Powder
• Sugar
• Flour
• Sweet Cream Butter
• Powdered Sugar
• Vanilla Extract
• Heavy Whipping Cream
• Hershey Milk Chocolate Bars

What To Serve With Hershey Bar Chocolate Sheet Cake

This is definitely the cake for chocolate lovers! My kids love it and always enjoy it with an iced cold glass of milk. I love it with a fresh pot of coffee and some vanilla ice cream. If you want even more chocolate, try it with homemade chocolate ice cream. I’ve also made an easy whipped cream upon request because a cake this good deserves more than store-bought.

How To Keep Your Leftover Cake Fresh

With sheet cakes, you’ll most likely keep the cake in the pan that it was baked in. That’s perfectly fine – just cover it with plastic wrap. You don’t have to refrigerate the cake, but make sure it’s not exposed to any warm areas. Enjoy the cake for 4-5 days for the best freshness.

Can You Freeze This Cake?

Yes! You can freeze this cake and it will be good frozen for up to three months. When I freeze the sheet cake, I transfer smaller pieces to an airtight food storage container. Just let it thaw on the kitchen counter for several hours before enjoying again.

Recipe Substitutions

Buttermilk adds more flavor, but if you need to use whole milk, the recipe will turn out just fine. If you don’t have any buttermilk in the house, follow these buttermilk substitution guidelines. Lastly, if you want to *gasp* use a different type of candy bar, feel free! I’m not sure you can call it a Hershey Chocolate Cake anymore.

How To Make Hershey Bar Chocolate Sheet Cake

Preheat oven to 350F degrees and spray a 9×13 baking dish with PAM Baking Spray. Using a large bowl, whisk the flour, sugar, cocoa powder, baking powder, and salt until combined.

Beat in the buttermilk, coffee, and oil until combined. Beat in the eggs, one at a time, until combined. Pour the batter into the baking dish and bake for 30-40 minutes or until a toothpick comes out clean. Allow to cool completely.

For The Chocolate Frosting: Using a standing mixer, beat the butter, powdered sugar, cocoa powder, heavy whipping cream, and vanilla until combined and holds peak.

Scoop about 1 C of the chocolate frosting into the piping bag, then set it aside. Scoop the remaining frosting onto the top of the cooled cake and spread evenly.

Unwrap the Hershey chocolate bars and place them onto the top of the frosting in rows of 2. Using the frosting in the piping bag, pipe dollops around the edge. Cut and serve!