Desserts
This Butterfinger cake recipe with chocolate cake delivers the ultimate indulgence—rich, fudgy layers swirled with crunchy peanut butter and Butterfinger pieces. The secret lies in balancing dense chocolate cake with creamy peanut butter frosting and those iconic candy chunks that add texture and nostalgia in every bite.
I developed this recipe after years of perfecting the right chocolate-to-peanut-butter ratio for maximum flavor impact.
The process starts with baking two layers of moist, chocolate cake that holds its shape while remaining tender. While still warm, we incorporate swirls of peanut butter frosting mixed with crushed Butterfinger candies, creating pockets of crunch and sweetness throughout each layer.
This technique ensures every slice delivers that perfect combination of textures and flavors.
What you'll end up with is a showstopping cake that's as beautiful as it is delicious—smooth chocolate layers contrasting with peanut butter swirls and candy crunch.
The frosting ties it all together with its signature creamy texture and peanut flavor, while the Butterfinger pieces add that signature candy crunch that makes this cake unforgettable.
Perfect for birthdays, celebrations, or when you simply need a decadent dessert, this recipe delivers restaurant-quality results with a homemade touch. The layers stay moist for days, and the flavor combination is so addictive you'll want to make it again and again. Let's get baking!
Ingredients for butterfinger cake recipe with chocolate cake
Twelve decadent ingredients transform into a showstopping Butterfinger cake with fudgy layers and peanut butter swirls.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 3 cups | Sifted for light texture |
| Granulated Sugar 🍚 | 2 ½ cups | White sugar preferred |
| Unsalted Butter 🧈 | 1 ½ cups | Room temperature, cubed |
| Large Eggs 🥚 | 4 whole | Room temperature |
| Unsweetened Cocoa Powder 🍫 | ¾ cup | Dutch-processed for smoothness |
| Baking Powder 🧂 | 2 tsp | Aluminum-free preferred |
| Salt 🧂 | ½ tsp | Fine sea salt |
| Milk 🥛 | 1 ½ cups | Whole milk for richness |
| Vanilla Extract 🌿 | 2 tsp | Pure Madagascar preferred |
| Butterfinger Candies 🍫 | 12 oz | Crushed into small pieces |
| Creamy Peanut Butter 🥜 | 1 ½ cups | Natural, unsweetened preferred |
| Powdered Sugar 🍚 | 3 cups | For frosting |
| Heavy Whipping Cream 🥛 | 1 cup | Cold for whipping |
| Butterfinger Candies (extra) 🍫 | ½ cup | Crushed for frosting topping |
The Butterfinger candies are the star—Reese’s or grocery store brand work, but the real deal delivers that nostalgic crunch. Crush them finely for even distribution in the cake and frosting. For the chocolate cake layers, King Arthur flour or Bob’s Red Mill make all the difference in texture. The cocoa powder? Dutch-processed like Hershey’s Special Dark ensures smoothness. Room-temperature butter and eggs are non-negotiable—microwave butter 40 seconds to soften if needed. The peanut butter should be creamy, not chunky—Jif or Skippy are reliable, but natural brands add richness.
No Butterfinger candies? Crushed Reese’s cups or peanut butter cups work in a pinch, though the flavor won’t be identical. Swap Dutch-processed cocoa for natural cocoa (reduce by 1 tbsp liquid), but expect a slightly bitter taste. Running low on powdered sugar? Confectioners’ sugar from a squeeze bottle (like Domino) avoids clumping. For the frosting, heavy whipping cream is key—Store-brand works, but Land O’Lakes whips better. Pro tip: Chill your mixing bowl before whipping to get stiffer peaks. The frosting should be thick enough to hold its shape but still pipe smoothly.
This cake tastes even better the next day—cover tightly with plastic wrap to keep it moist. Store at room temperature for 3 days or refrigerate for up to 1 week. For extra decadence, freeze layers before assembling—thaw overnight in the fridge. The frosting can be made 2 days ahead and stored in the fridge, then whipped back to fluffiness with a hand mixer. Slice with a warm knife for cleaner cuts, and always serve with a dollop of whipped cream for maximum indulgence.
Why You'll Love This Recipe
- No Mixer Needed: Mixing the batter by hand feels almost meditative—just cream the butter and sugar until light, fold in the cocoa and flour like you’re tucking in a cozy blanket. Honestly, the eggs and butter do most of the work here, so even if you’re not a baker, you’ll nail the texture.
- Peanut Butter Chocolate Magic: That crushed Butterfinger swirl? It’s the star. The rich cocoa cake base balances the salty-sweet crunch, and the peanut butter filling ties it all together like a hug. Between us, this combo is dangerously addictive—once you try it, you’ll crave it at 3 PM like clockwork.
- Birthday Party Hack: Slice it into squares, add a scoop of vanilla ice cream, and suddenly you’ve got a crowd-pleasing dessert that looks impressive but takes zero effort. I’ve used this for everything from kids’ birthdays to last-minute dinner guests—no one ever asks how simple it was to make.
- Leftovers? Even Better: This cake actually tastes better the next day—moist, fudgy, and perfect for breakfast or a midday pick-me-up. I’ll be real: I’ve wrapped slices in foil and stashed them in the freezer for lazy mornings, and they thaw out like a dream. Plus, the ingredients won’t break the bank.
Step-by-step instructions for Butterfinger cake with chocolate layers
Here's how to create a decadent cake with fudgy chocolate layers and rich peanut butter swirls—every bite is pure indulgence.
Prepare the Chocolate Cake Batter
Preheat your oven to 350°F and grease two 9-inch round cake pans, lining the bottoms with parchment paper. In a large mixing bowl, combine the 3 cups all-purpose flour, 2.5 cups granulated sugar, 0.75 cup unsweetened cocoa powder, 2 tsp baking powder, and 0.5 tsp salt. Whisk until evenly distributed—no lumps allowed.
In a separate bowl, beat the 1.5 cups unsalted butter (room temperature) and 4 whole large eggs together until light and fluffy, about 3-4 minutes. Gradually add the dry ingredients to the wet, mixing on low speed until just combined. Pour in the 1.5 cups milk and 2 tsp vanilla extract, mixing until smooth. Fold in the 12 oz crushed Butterfinger candies—this is where the magic happens.
Create the Peanut Butter Swirl Dough
In a small bowl, mix 1.5 cups creamy peanut butter with 1 cup granulated sugar until fully combined. This will be your swirl dough. Divide the chocolate batter evenly between the two prepared cake pans, filling each about halfway. Drop spoonfuls of the peanut butter mixture onto the batter in each pan, then swirl gently with a knife to create marbled patterns.
Return the pans to the oven and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean. The cakes should be moist but not wet—overbaking is the enemy of tender layers. Let them cool in the pans for 10 minutes before transferring to a wire rack to cool completely.
Make the Butterfinger Frosting
While the cakes cool, beat the 1 cup cold heavy whipping cream with an electric mixer until stiff peaks form. In a separate bowl, sift the 3 cups powdered sugar and gradually fold it into the whipped cream along with 1 tsp vanilla extract. The frosting should be smooth and spreadable—if it's too thick, add a splash of milk to loosen it.
Crush the 0.5 cup extra Butterfinger candies into small pieces and fold them into the frosting. This adds texture and bursts of peanut butter flavor in every bite. The frosting should be thick enough to hold its shape but still pipe smoothly—this is the perfect consistency for decorating.
Assemble and Decorate the Cake
Place one cake layer on a serving plate and spread a generous layer of the Butterfinger frosting on top. Add the second cake layer and press down gently. Cover the entire cake with the remaining frosting, using a spatula to smooth the sides. For extra flair, pipe swirls or rosettes on top with the leftover frosting.
Sprinkle the remaining crushed Butterfinger pieces over the top for a crunchy finish. Chill the cake in the refrigerator for 30 minutes before slicing—this helps the frosting set and makes serving easier. Each slice will reveal layers of rich chocolate cake, creamy peanut butter swirls, and crunchy Butterfinger bits.
Pro Tips For Making Butterfinger Cake Recipe With Chocolate Cake
- Melt Butter Slowly: I learned this the hard way—dumping cold butter into hot cocoa powder makes it seize up like a stubborn mule. Warm the butter first (just until it turns liquid but doesn’t brown), then whisk it into the cocoa before adding sugar. The batter will be smoother, and you’ll avoid lumps that turn into dry pockets in your cake.
- Sift the Flour Twice: Yes, even if the recipe doesn’t say it. The first sift gets the big chunks, but the second—after mixing all wet ingredients—catches the fine dust that settles during mixing. This keeps your Butterfinger cake layers light, not dense. (And trust me, your cake will thank you when it doesn’t sink in the middle.)
- Don’t Overmix the Batter: I used to beat this like I was punishing it, and my cakes turned out tough as leather. Mix the wet and dry ingredients just until combined—think "lumpy muffin batter," not "glossy pancake batter." Overmixing develops gluten, and your cake will be chewy instead of tender. Stop when the flour is barely incorporated.
- Use Room-Temp Eggs: Cold eggs curdle when they hit warm butter, and your batter will look like it’s fighting a losing battle. Pop those eggs out of the fridge 30 minutes before mixing—just enough time to warm up but not turn into a science experiment. Smooth batter = even crumb = happy cake. (Pro move: Crack them into a separate bowl first to avoid shells in your batter.)
Common mistakes when making this recipe
Overmixing the Batter
I’ve ruined more cakes than I’d like to admit by overmixing the batter, and this one is no exception. Once you’ve combined the dry ingredients with the wet, mix just until everything is just incorporated—no streaks of flour or butter.
Overmixing develops the gluten in the flour, which makes the cake dense and tough instead of light and tender. Stop mixing as soon as the batter comes together smoothly. 🥄
Skipping the Swirl Technique
The magic of this cake lies in those peanut butter swirls, so don’t just dump the peanut butter mixture on top and call it a day. Use a knife or offset spatula to gently swirl the peanut butter batter into the chocolate batter before baking.
This creates those beautiful marbled patterns and ensures every bite has both flavors. If you’re lazy (like I was the first time), you’ll miss out on the best part!
Using the Wrong Butterfinger Size
Crushing your Butterfinger candies too finely turns them into a paste, and leaving them too chunky means uneven texture. Aim for small, pea-sized pieces—just enough to add crunch without making each bite a chewing challenge.
If you’re in a hurry, pulse them in a food processor for about 10 seconds instead of over-crushing. Pro tip: Save a few whole candies to press into the top of the cake for a showstopping garnish. 🍫
Underbaking the Cake Layers
Nothing’s worse than a soggy middle, so resist the urge to pull the cake out early. Bake until a toothpick comes out clean (or with just a few moist crumbs).
If you’re unsure, err on the side of slightly longer baking—you can always cover the cake with a towel to keep it warm while you finish testing. Underbaked layers will turn gummy when sliced, and no one wants that texture in their dessert. 🕒
Frosting Too Thin or Too Thick
The frosting needs to be just right—thick enough to hold its shape but still pipeable. If it’s too thick, add 1 tablespoon of milk at a time until it loosens. If it’s too runny, chill the bowl for 10 minutes before trying to pipe it.
I’ve had frosting slide right off the cake when it was too warm, so always work in a cool kitchen or refrigerate the cake briefly before decorating. A little patience here goes a long way! 🎂
Not Chilling Before Slicing
Skipping the 30-minute chill in the fridge is a rookie mistake. The frosting needs time to set so it doesn’t slide off when you cut into the cake. If you’re impatient (I’ve been there), at least let it sit at room temperature for 15 minutes first.
Trust me, the first slice will be messy if you don’t—no one wants frosting on their shirt while trying to impress guests. ⏰
Nutrition facts
Frequently asked questions
Can I substitute Butterfinger candies with something else?
If you can't find Butterfinger candies, crushed Reese's peanut butter cups or even peanut butter cups work well. For a chocolate-only option, try crushed chocolate-covered pretzels or white chocolate chunks. Just remember that the texture and flavor will differ slightly—Butterfinger's unique peanut-butter-chocolate combination is hard to replicate!
How do I make this cake gluten-free?
Replace the all-purpose flour with a 1:1 gluten-free baking flour blend like Bob's Red Mill or King Arthur. You may need to add an extra 1/4 teaspoon of xanthan gum to help bind the cake. Also, ensure your cocoa powder and peanut butter are certified gluten-free. The texture might be slightly denser, but the flavor will still be delicious!
Can I make this cake ahead of time?
Yes! This cake actually tastes better the next day. Assemble the cake and frost it, then cover tightly with plastic wrap. Store at room temperature for up to 3 days or refrigerate for 1 week. For longer storage, freeze the fully assembled cake (unfrosted) for up to 3 months. Thaw overnight in the fridge before serving.
Why did my cake turn out dense?
Overmixing the batter is the most common cause of a dense cake. Mix just until combined—no streaks of flour or butter. Another culprit could be overbaking or underbaking. Check with a toothpick: it should come out with a few moist crumbs, not wet batter or completely clean. Room-temperature ingredients also help prevent density.
How do I decorate this cake for special occasions?
For a showstopping look, pipe swirls or rosettes on top with leftover frosting. Add whole Butterfinger candies around the base or press them into the sides. For extra flair, dust with powdered sugar or add chocolate shavings. You can also create a tiered effect by stacking smaller round layers. The possibilities are endless—let your creativity shine!