Decadent Butterfinger Cupcakes

The smell of chocolate cupcakes cooling on a wire rack used to signal something special was happening in our kitchen. My roommate would wander in from her room, following the scent like a cartoon character floating toward pie. These particular cupcakes became our Friday night tradition during exam week, when nothing else mattered but something sweet and incredibly indulgent.

I made these for my nephews birthday party last year, and the kids went absolutely silent for three whole minutes. That is the highest compliment a dessert can receive from a room full of eight year olds. His mom messaged me the next day asking for the recipe, which is really the only review that matters.

Ingredients

• All-purpose flour (1 cup): The foundation that gives these cupcakes their tender crumb, dont pack it down when measuring
• Unsweetened cocoa powder (1/2 cup): Use a good quality brand here because it is the main chocolate flavor in your cupcake base
• Granulated sugar (3/4 cup): Sweetens and helps create that gorgeous domed top we all want on our cupcakes
• Light brown sugar (1/2 cup): Adds moisture and a subtle caramel note that pairs beautifully with the peanut butter
• Baking soda (1/2 teaspoon): Helps the cupcakes rise and develop that perfect texture
• Baking powder (1/4 teaspoon): Works with the baking soda for extra lift and tenderness
• Salt (1/4 teaspoon): Balances the sweetness and intensifies the chocolate flavor
• Unsalted butter, melted (1/2 cup): Creates a rich, moist cupcake that stays fresh longer than oil-based versions
• Large eggs (2): Bring everything together and provide structure, room temperature eggs incorporate better
• Vanilla extract (1 teaspoon): Always use pure vanilla extract, it makes a noticeable difference
• Whole milk (1/2 cup): Adds richness and helps create a tender crumb
• Hot brewed coffee (1/2 cup): Intensifies the chocolate flavor without making them taste like coffee
• Creamy peanut butter (1/2 cup for filling): The surprise center that makes these cupcakes extraordinary
• Unsalted butter, softened (2 tablespoons): Makes the peanut butter filling smooth and pipeable
• Powdered sugar (1/2 cup): Sweetens the filling without adding graininess
• Milk (1 tablespoon): Adjusts the consistency of the peanut butter filling
• Unsalted butter, softened (1/2 cup): Must be truly soft for the silkiest frosting texture
• Powdered sugar (1 1/2 cups): Sift it first to avoid lumps in your beautiful frosting
• Creamy peanut butter (1/4 cup): Gives the frosting that signature flavor everyone loves
• Heavy cream (2 tablespoons): Creates that luxurious, pipeable consistency
• Vanilla extract (1/2 teaspoon): Rounds out all the flavors in the frosting
• Butterfinger candy bars, finely crushed (3/4 cup): The star of the show folded right into the frosting
• Butterfinger candy bars, coarsely chopped (1/4 cup): The finishing touch that adds crunch and announces what is inside

Instructions

Preheat your oven:

Set it to 350 degrees and line your muffin tin with liners, this little bit of prep makes everything else smoother

Whisk the dry ingredients:

Combine flour, cocoa, both sugars, baking soda, baking powder, and salt in a large bowl until well blended

Mix the wet ingredients:

Whisk melted butter, eggs, and vanilla in a separate bowl, then stir in milk and hot coffee until combined

Combine batter:

Pour wet into dry and mix just until combined, a few lumps are better than overmixed tough cupcakes

Fill and bake:

Divide batter among liners about two thirds full and bake 16 to 18 minutes until a toothpick comes out clean

Cool completely:

Let them rest in the pan for 5 minutes then move to a wire rack, patience here prevents soggy bottoms

Make the peanut butter filling:

Beat peanut butter and softened butter until smooth, then mix in powdered sugar and milk until creamy

Core the cupcakes:

Use a small knife or corer to remove the center about an inch deep, save those little cake plugs for snacking

Fill the centers:

Pipe or spoon the peanut butter filling into each cavity, do not be shy about filling them to the top

Make the frosting:

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

Add the crunch:

Fold in crushed Butterfinger pieces until distributed throughout the frosting

Frost and finish:

Pipe or spread generously on each cupcake and top with chopped Butterfinger pieces for that signature crunch

Save

These became my go to contribution for every office potluck after my department head took one bite and literally closed her eyes. There is something so satisfying about watching people discover that hidden peanut butter center for the first time.

Frosting Like A Pro

The secret to restaurant style frosting is letting your butter come to真正的 room temperature, not just slightly softened. When you press your finger into it, it should sink in without any resistance. This tiny detail makes the difference between grainy frosting and silk.

Filling Without The Mess

I learned to use a zip top bag with the corner snipped off for filling the cupcake centers. It gives you way more control than a spoon and keeps the edges of the cupcake nice and clean. Plus you can reuse the bag for frosting if you rinse it out first.

Making Them Ahead

These cupcakes actually taste better the next day when all those flavors have had time to become friends. Wrap them individually in plastic wrap once fully frosted and they will stay fresh for three days, though they never last that long in my house.

• Freeze unfrosted cupcakes for up to two months, thaw on the counter for an hour
• The peanut butter filling can be made three days ahead and stored in the fridge
• Bring all ingredients to room temperature before starting for the best texture

Save

There is nothing quite like the moment someone bites into one of these and discovers that creamy peanut butter center hidden inside. Pure chocolate peanut butter bliss in cupcake form.

Recipe FAQs

→ How do I store these cupcakes?

Store in an airtight container at room temperature for up to 3 days. For longer freshness, refrigerate up to 5 days. Bring to room temperature before serving for best texture.

→ Can I make these ahead of time?

Yes, bake cupcakes one day ahead. Cool completely, wrap tightly, and store at room temperature. Prepare filling and frosting separately. Fill and frost when ready to serve.

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

Place unwrapped bars in a sealed plastic bag and crush with a rolling pin or meat mallet. For fine crumbs, pulse in a food processor using short bursts to avoid over-processing.

→ Can I substitute the peanut butter?

Almond butter works well as a substitute. Sunflower butter offers a nut-free alternative. Note that flavor profiles will change slightly from the traditional peanut-butter pairing.

→ Why is coffee added to the batter?

Coffee enhances chocolate's natural flavors without adding a coffee taste. The deep, rich notes complement cocoa powder, creating more intense chocolate flavor in the finished cupcakes.