Decadent Butterfinger Cupcakes

The buttery sweet aroma of crushed Butterfinger bars takes me straight back to childhood Halloween nights, trading candy with my sister on the living room rug. These cupcakes started as a nostalgic experiment that turned into my most requested birthday treat. Something about that crispety, crunchety texture folded into creamy peanut butter frosting makes people's eyes light up before they even take a bite.

I brought these to a friend's dinner party last fall, and her husband—who claims he doesn't like sweets—ate three in ten minutes while standing by the kitchen counter. Now every time I see them, he asks casually if I happened to bake anything lately. Cupcakes have this way of breaking down people's defenses.

Ingredients

• All-purpose flour: The foundation that holds everything together, though I've learned sifting makes these notably lighter
• Unsweetened cocoa powder: Dutch process gives a deeper, fudgier chocolate flavor that stands up to all that sweet peanut butter
• Granulated and light brown sugar: The combo creates moist tender crumb while brown sugar adds a subtle caramel note
• Baking soda and powder: Both necessary here for proper lift since the melted butter makes these dense and rich
• Unsalted butter melted: Melting it first creates an incredibly moist cupcake that stays fresh longer
• Large eggs room temperature: Cold eggs can seize melted butter so I always set mine out thirty minutes before baking
• Vanilla extract: Don't skimp here—pure vanilla makes the chocolate taste more chocolatey somehow
• Whole milk: Full fat makes a difference in texture and keeps the cupcakes tender
• Hot brewed coffee: Enhances chocolate flavor without tasting like coffee, my grandmother's trick I swore wouldn't work
• Creamy peanut butter: A major brand works best here since natural separates too easily in frosting
• Butterfinger candy bars: Freeze them for twenty minutes before crushing—they shatter into perfect crisp pieces instead of turning into paste

Instructions

Preheat your oven and prepare the pan:

350°F with rack in center position, liners ready while you gather everything in one place

Whisk together the dry ingredients:

Flour through salt in a large bowl, breaking up any brown sugar clumps with your fingers

Mix the wet ingredients separately:

Whisk melted butter, eggs, and vanilla until smooth, then stir in milk and hot coffee until combined

Combine wet and dry ingredients:

Pour wet into dry and fold gently until streaks disappear—over mixing makes tough cupcakes

Fill and bake the cupcakes:

Divide batter among liners using a cookie scoop for even portions, bake 16 to 18 minutes until set

Cool completely before filling:

Five minutes in pan then wire rack, because hot cupcakes melt the peanut butter filling into a mess

Prepare the peanut butter filling:

Beat peanut butter and butter until smooth, then add powdered sugar and milk until fluffy

Core and fill the cupcakes:

Remove centers with a small knife at one inch depth, fill each cavity with a generous teaspoon of peanut butter mixture

Make the Butterfinger frosting:

Beat butter until creamy, add powdered sugar and peanut butter, then cream and vanilla until fluffy

Fold in crushed candy and frost:

Gently stir in crushed Butterfinger pieces, pipe or spread generously, top with coarsely chopped candy

Save

My nephew helped me crush the Butterfingers for the first batch, and the kitchen floor looked like a candy confetti explosion when we finished. Now we do it inside a plastic bag and take turns pounding it with a rolling pin—it's become our weird little bonding ritual.

Making These Ahead

Bake and cool cupcakes completely, then wrap tightly and freeze unfilled for up to a month. Thaw overnight in the refrigerator, bring to room temperature, then fill and frost the same day you plan to serve them.

Getting That Perfect Crunch

The secret is freezing the candy bars before crushing them—room temperature Butterfingers turn into a sticky paste instead of maintaining those signature crispy bits that make these cupcakes special. A food processor pulses them into perfect texture without over processing.

Troubleshooting Your Frosting

If your frosting is too stiff, add cream one teaspoon at a time. Too thin? Add powdered sugar a tablespoon at a time. Humidity affects frosting consistency, so work quickly once you've achieved the right texture.

• Chill the frosted cupcakes for fifteen minutes to set the frosting
• Store in a single layer to prevent smashing the tops
• Bring to room temperature twenty minutes before serving

Save

These cupcakes have a way of disappearing faster than any other dessert I make, and I've learned to double the recipe if I want any leftovers for myself the next day.

Recipe FAQs

→ Can I make these cupcakes ahead of time?

Yes, you can bake the cupcakes a day in advance. Store them in an airtight container at room temperature. Add the filling and frosting on the day you plan to serve them for the freshest texture and crunch.

→ What's the best way to crush Butterfinger bars?

Place the candy bars in a sealed plastic bag and crush them with a rolling pin or meat mallet. For finely crushed pieces needed in the frosting, pulse them in a food processor for a few seconds. The garnish pieces work best when hand-crushed for a chunkier texture.

→ Can I use natural peanut butter instead of creamy?

Creamy commercial peanut butter works best because it contains stabilizers that create a smooth, pipeable texture. Natural peanut butter tends to separate and may make the filling too runny. If using natural peanut butter, refrigerate the filled cupcakes to firm up the filling before frosting.

→ Why is coffee added to the chocolate batter?

Coffee enhances the chocolate flavor without adding a coffee taste. The deep, rich notes from brewed coffee intensify the cocoa powder, creating a more complex and decadent chocolate cupcake. If you prefer, you can substitute hot water.

→ How do I store leftover cupcakes?

Store finished cupcakes in an airtight container at room temperature for up to 2 days. For longer storage, refrigerate for up to 5 days, though the Butterfinger pieces may lose some crunch. Bring to room temperature before serving for the best flavor and texture.

→ Can I substitute the Butterfinger candy bars?

You can use other chocolate-covered peanut butter candies like Reese's Cups chopped into pieces, or try chocolate-peanut butter candies like Baby Ruth. The texture and flavor profile will change slightly but still deliver a delicious chocolate-peanut butter combination.