Desserts
This Hershey’s deep dark chocolate cake delivers layers of fudgy richness with a secret moisture boost that keeps every slice decadent for days. The key lies in combining melted chocolate with buttermilk and sour cream—simple ingredients that transform ordinary cake into something restaurant-worthy.
I’ve baked this exact recipe for holidays and family gatherings, and it never disappoints.
What sets this cake apart is its deep, intense chocolate flavor that comes from using Hershey’s deep dark chocolate bars, not cocoa powder. The texture is the real star: dense yet tender, with a moist crumb that resists drying out.
A quick glaze of melted chocolate and cream on top adds that signature Hershey’s shine and extra indulgence.
Baking takes just 45 minutes from start to finish, including cooling, making it perfect for last-minute celebrations. The layers stay perfectly moist thanks to a simple trick—folding in sour cream at the end—which prevents cracking and keeps the cake tender.
Each slice is rich enough to satisfy chocolate cravings without being overly sweet.
Pair it with vanilla ice cream or a dusting of cocoa powder for the ultimate dessert experience. The foolproof method ensures consistent results every time, whether you’re a seasoned baker or just starting out. Let’s get baking—your taste buds will thank you.
Ingredients for hershey's deep dark chocolate cake
Eight ounces of deep dark chocolate plus buttermilk and sour cream—this is the secret to restaurant-quality cake.
| Ingredient | Amount | Notes |
|---|---|---|
| Hershey's Deep Dark Chocolate Bars 🍫 | 8 oz | High cocoa content for intense flavor |
| All-Purpose Flour 🌾 | 2 ½ cups | Sifted for light texture |
| Granulated Sugar 🍚 | 2 cups | White or light brown |
| Unsalted Butter 🧈 | 1 ½ cups | Room temperature, cubed |
| Large Eggs 🥚 | 2 whole | Room temperature for even mixing |
| Buttermilk 🥛 | 1 cup | Fresh for best moisture |
| Sour Cream 🍦 | ½ cup | Full-fat for richness |
| Vanilla Extract 🌸 | 2 tsp | Pure, high-quality extract |
| Baking Powder 🍞 | 1 tsp | Aluminum-free preferred |
| Salt 🧂 | ½ tsp | Fine sea salt preferred |
| Heavy Cream 🥛 | ½ cup | Cold for glaze |
| Powdered Sugar 🍚 | ¼ cup | For glaze |
| Cocoa Powder 🍫 | ¼ cup | Natural unsweetened |
The Hershey's deep dark chocolate bars are non-negotiable here—8 oz gives that signature fudgy depth. Grab them from the baking aisle, not the candy section. Trader Joe's and Walmart usually stock them year-round. For the butter, Land O'Lakes or Plugrá work perfectly, but make sure it's unsalted—the cake's salt balance depends on it. The buttermilk needs to be fresh; if yours has curdled, strain it or grab a new carton. Costco sells huge tubs that last months if you're baking often.
No buttermilk? Mix 1 cup milk plus 1 tbsp vinegar or lemon juice and let sit for 5 minutes. Short on sour cream? Greek yogurt at half the amount works in a pinch. The cocoa powder is just for dusting—Hershey's Special Dark is ideal, but any natural unsweetened will do. Want extra richness? Add 1 oz melted chocolate to the glaze. The vanilla extract should be pure—McCormick or Nutiva are solid choices. If your recipe calls for baking powder, Diamond Crystal is the gold standard (it's double-acting, so it leavens twice).
This cake keeps beautifully—3 days at room temperature wrapped tightly, or up to 5 days in the fridge. For longer storage, freeze the whole cake (unfrosted) for up to 3 months. Thaw overnight at room temperature. The glaze sets fast, so assemble the cake right before serving. Leftovers? Toast slices for 10 seconds in the toaster—crispy edges, gooey center. Trust me, it's worth the extra minute.
Why You'll Love This Recipe
- No Mixer Needed: I swear by this recipe when I’m too tired to pull out the stand mixer—just melt the chocolate bars with butter, stir in the sugar, and fold in the eggs. The batter’s so rich and thick, it practically mixes itself.
- Fudgy-Cake Magic: That Hershey’s Deep Dark chocolate? It’s not just dark—it’s intense, with a molasses-like depth that lingers. The cake stays moist for days, and the crumb? So tender it melts in your mouth like a secret.
- Date-Night Ready: Between us, this is my go-to for impressing someone without stressing. Serve it with whipped cream or a dusting of cocoa, and suddenly you’re the host who actually baked something. (No one needs to know it took 20 minutes.)
- Budget-Friendly Luxury: I use this recipe when I want to splurge on flavor but not ingredients. A box of Hershey’s bars and a few pantry staples? That’s it. And because it keeps well, I make a batch and freeze half—no sad, dried-out slices here.
Step-by-step instructions for Hershey's deep dark chocolate cake
Here's how to bake a decadent, fudgy chocolate cake with layers so moist they'll disappear in seconds.
Melt and Prepare the Chocolate Base
Preheat your oven to 350°F and line two 9-inch round cake pans with parchment paper. Chop the 8 oz Hershey's Deep Dark Chocolate Bars into small pieces and place them in a heatproof bowl. Melt the chocolate in 2-minute intervals in the microwave, stirring between each interval until completely smooth. The chocolate should reach 110°F - use a candy thermometer if you have one, or test by dipping a spoon in water - it should coat the spoon evenly without streaking.
While the chocolate melts, sift together the 2.5 cups all-purpose flour, 0.25 cup cocoa powder, 1 tsp baking powder, and 0.5 tsp salt in a medium bowl. Set aside. This dry mix is your secret to even distribution and that signature chocolate flavor in every bite.
Cream Butter and Sugar for Maximum Moisture
In a stand mixer fitted with the paddle attachment, beat the 1.5 cups unsalted butter (at room temperature) and 2 cups granulated sugar on medium speed for 3-4 minutes until light and fluffy. This step is crucial - you're incorporating air that will create that tender crumb we're after. Scrape down the sides of the bowl with a rubber spatula to ensure even mixing.
Add the 2 whole large eggs, one at a time, mixing well after each addition. Then stir in the 2 tsp vanilla extract and the melted chocolate until completely combined. The batter should be thick and glossy at this stage - almost like a rich chocolate pudding. If it looks too thin, don't worry, as the dry ingredients will thicken it up.
Combine Wet and Dry Ingredients for Perfect Texture
With the mixer on low speed, gradually add the sifted dry ingredients to the wet mixture, alternating with the 1 cup buttermilk and 0.5 cup sour cream. Start and end with the dry ingredients. Mix just until combined - you should still see some flour streaks. Overmixing develops gluten, which can make the cake tough. The batter should be thick and smooth, with a deep chocolate color that makes you want to taste it right away.
Divide the batter evenly between the prepared cake pans. Tap each pan gently on the counter to release any air bubbles. Bake for 30-35 minutes or until a toothpick inserted in the center comes out clean. The edges should be set but the center should still have a slight wobble - this ensures maximum moisture. Rotate the pans halfway through baking for even cooking.
Create the Ultimate Chocolate Glaze
While the cakes cool in their pans for 10 minutes, prepare the glaze by whisking together the 0.5 cup heavy cream, 0.25 cup powdered sugar, and 0.25 cup cocoa powder in a small saucepan. Heat over medium-low heat, stirring constantly, until the mixture reaches 115°F and thickens slightly to a glossy consistency. It should coat the back of a spoon smoothly - this is what gives our cake that professional bakery finish.
Remove the cakes from the pans and let them cool completely on a wire rack. Once cooled, spread the glaze evenly over the top of each cake layer. For extra decadence, you can also pipe some glaze between the layers when assembling. The glaze will set as it cools, creating that beautiful glossy finish that makes this cake irresistible.
Assemble and Enjoy Your Moist Chocolate Masterpiece
Place one cake layer on a serving plate and spread a generous layer of the remaining glaze on top. Add the second cake layer and spread the remaining glaze on top and around the sides. For a restaurant-quality presentation, you can dust the top with a little extra cocoa powder or add chocolate shavings from the Hershey's Deep Dark Chocolate Bars. The cake will keep well at room temperature for 3 days covered, or you can freeze it for up to 3 months.
Cut into slices and serve immediately for the most moist experience. Each bite should deliver that perfect balance of rich chocolate flavor, tender crumb, and just the right amount of sweetness. The secret moisture boost from the buttermilk and sour cream ensures this cake stays moist for hours after baking - no dry crumbs here!
Pro Tips For Making Hershey'S Deep Dark Chocolate Cake
- Melt Chocolate Slowly: I learned this the hard way—dumping chopped chocolate bars into hot butter and walking away. Instead, melt the butter first (just until it foils), then remove from heat and add the chocolate in small batches, stirring until fully smooth. The residual heat does the work without burning the deep dark cocoa’s intense flavor.
- Sift the Flour Twice: This isn’t the prettiest method, but it’s the tastiest. After sifting once, give that flour another quick pass—especially if it’s lumpy or old. The Hershey’s bars are already heavy on cocoa; a smooth batter prevents dry pockets. (Yes, even if you’re impatient like me.)
- Stop Mixing at "Just Combined": Overmixing turns this cake dense and tough. Once the wet ingredients (butter, eggs, sugar) and dry ingredients (flour, cocoa) come together, do a quick fold—maybe 10 strokes max. The moment you see no dry spots, call it done. Your future self will thank you.
- Use Room-Temp Eggs: Cold eggs add air bubbles that can cause sinkholes in your cake. Let them sit in warm water for 5 minutes before cracking them—just enough to loosen the whites slightly. The batter will be smoother, and the texture lighter. (No, the microwave isn’t cheating.)
Regional styles of these flavors
Southern Comfort Twist
In the South, this deep dark chocolate cake gets a bourbon-infused glaze that takes it to the next level. After baking, replace the standard glaze with ½ cup heavy cream, ¼ cup powdered sugar, and 1 tbsp bourbon (like Maker’s Mark or Buffalo Trace).
Warm the mixture to 115°F and brush it over the cooled layers. The bourbon adds a caramelized depth that pairs beautifully with the rich chocolate. Top with pecan praline clusters for a true Southern dessert experience. 🥃
New England Chocolate Chip
Up north, they love adding chocolate chip swirls to their deep dark chocolate cakes. After dividing the batter, sprinkle ½ cup mini Hershey’s dark chocolate chips (or Enjoy Life brand for vegan options) over one layer before adding the second. Use a knife to gently swirl them into the batter.
Bake as directed, then finish with a salted caramel drizzle—mix ½ cup caramel sauce with ¼ tsp flaky sea salt and pipe over the top. The contrast of salty, sweet, and chocolate is pure New England indulgence. ❄️
Midwest Spiced Version
The Midwest puts a warm spice twist on this cake by adding 1 tsp cinnamon and ½ tsp nutmeg to the dry ingredients. For extra coziness, fold in ½ cup chopped walnuts into the batter before baking.
After assembling, dust the top with a mix of powdered sugar and cocoa powder for a snowy finish. Serve with a scoop of vanilla bean ice cream—this combo is a Midwest classic. 🌾
West Coast Decadence
Out West, they love espresso-infused chocolate cakes for that bold, aromatic kick. Replace ½ cup of the hot coffee in the glaze with strong brewed espresso (or instant espresso powder dissolved in warm water). Add 1 tsp vanilla bean paste for extra depth.
Top with dark chocolate ganache (melt 4 oz Hershey’s dark chocolate with ¼ cup heavy cream) and sprinkle with sea salt flakes. The espresso enhances the chocolate’s richness—perfect for coffee lovers. ☕
Hawaiian Tropical Twist
For a tropical vibe, swap out the glaze for a coconut-chocolate ganache. Melt ½ cup coconut cream (chilled overnight) with 4 oz Hershey’s dark chocolate, then drizzle over the cake. Garnish with toasted coconut flakes and fresh mango slices for a bright, island-inspired dessert.
The coconut adds a creamy contrast to the deep chocolate, making it feel like a vacation in every bite. 🌺
Nutrition facts
Frequently asked questions
Can I substitute Hershey's deep dark chocolate bars with regular dark chocolate?
The deep dark chocolate bars are essential for that signature intense flavor and fudgy texture. Regular dark chocolate (60-70% cocoa) won't provide the same rich depth. If you absolutely must substitute, use Hershey's Special Dark (85% cocoa) or Ghirardelli 90% dark chocolate—both deliver comparable richness. The recipe counts on the 8 oz of deep dark chocolate for moisture and flavor balance.
Why does my cake turn out dense instead of moist?
Overmixing the batter or skipping the sour cream/buttermilk are the most common culprits. Mix just until combined—you should still see flour streaks. Also, ensure your butter is room temperature (not melted) and don't overbake. The cake should have a slight wobble in the center when done. For extra moisture, brush the cooled layers with 1 tbsp simple syrup before assembling.
How do I make this cake gluten-free?
Replace the 2.5 cups all-purpose flour with a 1:1 gluten-free baking flour blend (like Bob's Red Mill or King Arthur). Add ½ tsp xanthan gum to help bind the crumb. Reduce the buttermilk to ¾ cup to prevent excess moisture. Test the recipe first—gluten-free cakes often need slight adjustments in liquid ratios. The glaze remains the same.
Can I bake this cake in a different pan size?
Yes, but adjust baking time accordingly. For a 9x13-inch pan, bake 35-40 minutes (cover loosely with foil if browning too fast). For 8-inch pans, bake 25-30 minutes. The key is to check doneness with a toothpick—it should come out with moist crumbs, not wet batter. Always rotate pans halfway through for even cooking.
What's the best way to store leftovers?
Wrap the cake tightly in plastic wrap or store in an airtight container at room temperature for up to 3 days. For longer storage, freeze the unfrosted cake for up to 3 months. Thaw overnight in the fridge, then bring to room temperature before serving. Reheat slices in the microwave for 10-15 seconds to restore moisture.