Desserts
This Hershey Chocolate Bar Cake delivers the perfect marriage of fudgy swirls and crunchy chocolate bites in every slice. The secret lies in melting actual Hershey bars into the batter and swirling them with a rich chocolate ganache, creating layers of texture that mimic the iconic candy bar itself.
After years of perfecting this recipe, I can confidently say it’s the closest you’ll get to eating a chocolate bar in cake form—without the guilt.
The cake itself is moist and tender, thanks to a combination of buttermilk and brown sugar that keeps it rich yet not overly sweet. What sets this apart is the crunchy chocolate bits baked right into the layers, which stay crisp even after slicing.
The ganache filling adds a velvety contrast, while the Hershey-inspired frosting ties everything together with that familiar, nostalgic flavor. It’s the kind of dessert that disappears faster than you can say "chocolate overload."
Baking this cake requires precision—350°F for 30-35 minutes—to ensure the layers set properly without drying out. The result is a cake with fudgy swirls that melt in your mouth and crunchy chocolate bits that add satisfying texture with every bite.
Whether you’re serving it at a party or treating yourself to a weekend indulgence, this recipe delivers restaurant-quality results with minimal effort.
For extra decadence, top with whipped cream or crushed Hershey bars before serving. The possibilities are endless, but the cake itself stands strong as a showstopper. Let’s get baking—your taste buds will thank you.
Ingredients for hershey chocolate bar cake
Twelve ingredients, two textures, one unforgettable chocolate experience. These staples transform into fudgy swirls with crunchy chocolate bites.
| Ingredient | Amount | Notes |
|---|---|---|
| Hershey's Milk Chocolate Bars 🍫 | 12 oz | Standard-sized, chopped into chunks |
| All-Purpose Flour 🌾 | 2 ½ cups | Sifted, spooned lightly |
| Granulated Sugar 🍚 | 2 cups | White sugar, standard grade |
| Packed Brown Sugar 🍚 | 1 cup | Light brown preferred |
| Buttermilk 🥛 | 1 ½ cups | Full-fat, room temperature |
| Unsalted Butter 🧈 | 1 ½ cups | Cold, cubed for creaming |
| Large Eggs 🥚 | 2 whole | Room temperature, separated |
| Vanilla Extract 🌿 | 2 tsp | Pure, high-quality extract |
| Baking Powder 🧂 | 1 tbsp | Diamond Crystal preferred |
| Baking Soda 🧂 | ½ tsp | Pure baking soda |
| Salt 🧂 | ½ tsp | Fine sea salt |
| Semi-Sweet Chocolate Chips 🍫 | 1 ½ cups | Nestlé or Ghirardelli |
| Heavy Whipping Cream 🥛 | 1 cup | Cold, full-fat |
| Hershey's Cocoa Powder 🍫 | ½ cup | Natural, unsweetened |
| Powdered Sugar 🍚 | 3 cups | For frosting, sifted |
The chocolate bars are non-negotiable here. Hershey's Milk Chocolate Bars give that iconic candy bar flavor—don't substitute with other brands unless you're okay with a different profile. Grab a family-size bag from Walmart or Target for consistency, or break up your own bars into 1-inch chunks (the good stuff, not the pre-chopped kind). For the cocoa powder, Hershey's Natural Cocoa is the gold standard—it's what you'll find in classic recipes. If you're using a different brand, check the fat content; some have added sugar that can alter the ganache texture. The buttermilk? Store-bought is fine, but if you're feeling fancy, mix 1.5 cups milk with 1.5 tbsp vinegar and let it sit for 5 minutes.
No Hershey's bars? Use semi-sweet chocolate bars (like Ghirardelli) but add an extra 1 tbsp cocoa powder to the ganache to mimic the milk chocolate flavor. The baking powder and baking soda are a team—Diamond Crystal baking powder is the most reliable, but if you've got Aluminum-free in your pantry, that works too. Short on chocolate chips? Chop up 8 oz of your favorite chocolate bar (dark or milk) instead. The whipping cream needs to be cold—pull it out of the fridge 10 minutes before whipping so it's just chilled, not icy. And for the frosting, powdered sugar should be sifted to avoid lumps—a fine-mesh sieve works best. If you're in a pinch, pulse it in a food processor for 10 seconds.
The chopped chocolate bars keep best in an airtight container in the freezer for up to 3 months—they stay crisp that way. The cake layers themselves? Cool completely before assembling with ganache, or the frosting will melt. This cake reheats beautifully—30 seconds in the microwave makes the chocolate bits gooey again. For extra decadence, store leftover ganache in the fridge and dollop it on top of slices. The powdered sugar frosting? Use within 2 weeks—it's best fresh, but you can refrigerate it to prevent weeping.
Why You'll Love This Recipe
- Fewer Ingredients, More Magic: I swear by this recipe because it’s that simple—just five core ingredients, no fancy substitutions. The Hershey’s bars melt right into the batter, so you’re not fussing with multiple bowls or melting chocolate separately.
- Rich Without Effort: That deep Hershey’s flavor? It’s like a warm hug in cake form. The brown sugar adds a caramel note, while the buttermilk keeps it moist—no dry crumbs here, just pure, melty satisfaction.
- Birthday or Breakfast: Serve it with whipped cream for a birthday cake, or slice it up for a quick breakfast with coffee. Honestly, I’ve even packed it in lunchboxes—kids (and adults) devour it cold or at room temp.
- Budget-Friendly Indulgence: A whole box of Hershey’s bars costs less than $3, and the rest are pantry staples. Plus, leftovers stay fresh for days—perfect for when you bake once and enjoy twice (or three times).
Step-by-step instructions for Hershey chocolate bar cake recipe
Here's how to create a decadent cake with rich fudgy swirls and crunchy chocolate chunks.
Prepare the Chocolate Swirl Dough
First, preheat your oven to 350°F and grease two 9-inch round cake pans, lining the bottoms with parchment paper. In a medium saucepan, combine the 12 oz chopped Hershey's Milk Chocolate Bars and 1 cup heavy whipping cream. Heat over medium-low heat, stirring constantly until the chocolate melts completely and the mixture becomes smooth. Remove from heat and let cool slightly.
In a separate bowl, whisk together the 2 whole large eggs and 1 cup packed brown sugar until pale and slightly thickened—this should take about 3-4 minutes with a hand mixer. Gradually fold in the melted chocolate mixture, then add 2 tsp vanilla extract and mix until fully combined. This will be your rich chocolate swirl dough. Set aside for now.
Cream Butter and Sugars for the Cake Batter
In a large mixing bowl, combine the 1.5 cups unsalted butter and 2 cups granulated sugar. Beat on medium speed with an electric mixer until light and fluffy, about 3-4 minutes. This step is crucial—you're incorporating air to create a tender cake texture. Scrape down the sides of the bowl to ensure even mixing.
Add the 2 whole large eggs, one at a time, mixing well after each addition. Then stir in the 1.5 cups buttermilk, 2 tsp vanilla extract, and 0.5 tsp salt. In a separate bowl, sift together the 2.5 cups all-purpose flour, 1 tbsp baking powder, and 0.5 tsp baking soda. Gently fold the dry ingredients into the wet mixture just until combined—overmixing will make the cake dense.
Layer and Swirl the Dough
Divide the cake batter evenly between the two prepared pans. For each pan, take half of the chocolate swirl dough and spread it over the batter in a thin layer, then use a knife to create swirls by dragging the knife through the batter from the center to the edges. This creates those signature chocolate ribbons throughout the cake.
Sprinkle 1.5 cups semi-sweet chocolate chips evenly over the swirled batter in each pan. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean. Rotate the pans halfway through baking for even browning. Let the cakes cool in the pans for 10 minutes, then transfer to a wire rack to cool completely.
Make the Chocolate Frosting
In a medium saucepan, combine the 0.5 cup Hershey's Cocoa Powder, 3 cups powdered sugar, and 1.5 cups unsalted butter. Heat over low heat, stirring constantly until the butter melts and the mixture becomes smooth. Remove from heat and let cool slightly—it should be thick enough to spread but still pourable.
Once the cakes are completely cool, place one cake layer on a serving plate. Spread half of the frosting evenly over the top, then place the second layer on top. Frost the entire cake with the remaining frosting, smoothing the sides with a spatula. For extra flair, sprinkle additional semi-sweet chocolate chips on top. Chill in the refrigerator for 30 minutes before serving to let the frosting set.
Pro Tips For Making Hershey Chocolate Bar Cake
- Melt Chocolate Slowly: Chop the Hershey bars into small, even pieces first—this melts them faster and more evenly than dumping in whole bars. I learned this the hard way when I ended up with one giant unmelted lump in the middle of my cake batter.
- Mix Dry Ingredients First: Sift the flour, cocoa powder (from the chocolate bars), and baking powder together before adding wet ingredients—this cuts out lumps and guarantees a smoother batter. Yes, even if you’re in a hurry, take the 30 seconds to do this.
- Don’t Overmix the Batter: Once you add the buttermilk, mix just until combined—overworking it makes the cake dense. I used to panic and stir like crazy, but stopping at "barely mixed" gives you a lighter texture.
- Use Room-Temp Buttermilk: Cold buttermilk curdles when mixed with melted chocolate, throwing off the whole recipe. Let it sit out for 15–20 minutes before using—your cake will thank you with a richer flavor and better rise.
Creative variations of this hershey chocolate bar cake
Peanut Butter Swirl
Combine ½ cup creamy peanut butter (like Jif) with ½ cup Hershey's Milk Chocolate Bars melted in ¼ cup heavy cream.
Swirl this mixture into the batter before baking—just like the chocolate swirls—for a nostalgic Hershey's Reese's vibe. 🥜 For extra crunch, sprinkle chopped peanuts on top before baking.
White Chocolate Raspberry
Replace half the milk chocolate with 10 oz white chocolate bars (like Hershey's White Chocolate) and fold in ½ cup raspberry jam (I love Smucker's) with the melted chocolate.
The result? A fruity, creamy contrast that pairs perfectly with the classic chocolate flavor. Top with fresh raspberries before serving.
Salted Caramel Twist
Add ½ cup caramel sauce (store-bought or homemade) to the chocolate ganache filling, then sprinkle with flaky sea salt (like Maldon) before chilling. The salty-sweet combo elevates the cake to gourmet status. Drizzle extra caramel over the top for a showstopping presentation. 🍯
Espresso Chocolate Boost
Incorporate 1 tbsp instant espresso powder into the cake batter for a subtle coffee kick—it deepens the chocolate flavor without tasting like coffee. For the ganache, add 1 tsp vanilla bean paste (like Gourmet Vanilla Bean) to enhance the richness. This variation is perfect for coffee lovers.
Nutella Layer Cake
Spread a thin layer of Nutella between the cake layers instead of ganache, then top with whipped cream and crushed Hershey's Milk Chocolate Bars. The hazelnut-chocolate combo adds a European twist. For extra indulgence, drizzle melted chocolate over the top before serving. 🌟
Gluten-Free Adaptation
Substitute the all-purpose flour with a 1:1 gluten-free baking flour blend (like Bob's Red Mill) and ensure your baking powder is gluten-free. Replace chocolate chips with gluten-free dark chocolate chunks to keep the texture intact. The result? A rich, moist cake that’s just as decadent without the gluten. 💪
Nutrition facts
Frequently asked questions
Can I substitute Hershey's chocolate bars with other brands?
While you can use other milk chocolate bars like Ghirardelli or Nestlé, Hershey's provides that classic, nostalgic flavor we all love. For a closer match, add 1 tbsp extra cocoa powder to the ganache if using semi-sweet chocolate. The texture will still be great, but the taste will differ slightly.
Why does my cake turn out dry?
Overbaking is the #1 cause of dryness. Pull the cake when a toothpick comes out with moist crumbs, not clean. Also, ensure your butter and eggs are room temperature—cold ingredients can prevent proper moisture distribution. For extra richness, brush the layers with simple syrup before frosting.
How do I make this cake gluten-free?
Replace all-purpose flour with a 1:1 gluten-free baking flour blend (like Bob's Red Mill) and use gluten-free baking powder. For chocolate chips, opt for gluten-free dark chocolate chunks. The texture stays moist when using these substitutes.
Can I bake this cake in a different pan size?
Yes, but adjust baking time accordingly. For 8-inch pans, bake 25-30 minutes (same temp). For 10-inch pans, reduce to 20-25 minutes. Always check with a toothpick. The key is medium doneness—underbaked cake can be dense, while overbaked cake dries out.
How far ahead can I make this cake?
Assembled cake keeps well in the fridge for 3-4 days (covered tightly). For longer storage, freeze the layers (unfrosted) for up to 2 months. Thaw overnight in the fridge before frosting. The ganache stays stable when refrigerated, so no need to rush!