These ultimate Snickers cupcakes feature ultra-moist chocolate cake, a rich salted caramel core, and a mountain of creamy peanut butter frosting.
- Hot Liquid Blooming: Hot coffee or water dissolves and blooms the natural cocoa powder, releasing deep, oil-soluble flavor compounds for maximum chocolate intensity.
- Chemical Leavening Balance: Using natural cocoa powder preserves the acidic pH necessary to react with the baking soda, ensuring a perfect rise despite the heavy caramel filling.
- Emulsified Peanut Butter Frosting: High-fat heavy cream and creamy peanut butter are whipped to create a stable protein matrix that won't separate or weep over time.
Sitting on the cold linoleum of my first apartment kitchen, sorting through a pile of leftover fun-size candy bars while a temperamental oven hummed in the corner, I realized that the classic candy bar deserved a serious upgrade.
It needed to become a cake.
This isn't just a basic chocolate cupcake with a piece of candy shoved inside; it is a carefully engineered tribute to the salty, sweet, peanut-packed original. We start with an incredibly dark, oil-based chocolate cake that remains soft even when chilled, hollow out the center, and flood it with a pool of deep, buttery caramel before capping it with a cloud of salty peanut butter frosting. If you love this combination, you'll also obsess over our no-bake chocolate peanut butter bars.
The magic lies in the contrast between bitter cocoa and the intense, salty-sweet filling.
To get that deep chocolate flavor, we rely on hot coffee to bloom the natural cocoa powder, which coaxes out its oil-soluble flavor compounds while the acidic pH of the cocoa reacts beautifully with the baking soda to create a light, airy crumb. This batter is quite similar to our ultra-rich deliciously moist chocolate layer cake, which relies on a high-liquid ratio for its tender texture.
Do not use cheap, thin cupcake liners here; they fail every test by absorbing oil and turning soggy before the cakes even cool.
Go with greaseproof ones.
Ultimate Snickers Cupcakes
Ingredients
- For the Chocolate Cupcakes:
- 1 cup (125g) all-purpose flour (spooned and leveled)
- 1/2 cup (42g) unsweetened natural cocoa powder
- 1 teaspoon baking soda
- 1/2 teaspoon baking powder
- 1/2 teaspoon salt
- 1/3 cup (75g/80ml) vegetable oil
- 1 cup (200g) granulated sugar
- 1 large egg, at room temperature
- 1 teaspoon pure vanilla extract
- 1/2 cup (120g/ml) buttermilk, at room temperature
- 1/2 cup (120g/ml) hot water or freshly brewed hot coffee
- For the Peanut Butter Frosting:
- 5 Tablespoons (71g) unsalted butter, softened to room temperature
- 1 cup (250g) creamy peanut butter
- 1 cup (120g) confectioners’ sugar
- 1/3 cup (80g/ml) heavy cream
- 1 teaspoon pure vanilla extract
- 1/4 teaspoon salt
- For the Assembly & Toppings:
- 1/2 cup (145g) store-bought or homemade caramel sauce (cooled and thickened)
- 5 to 6 fun-size Snickers bars, chopped
Directions
- Preheat your oven to 350°F (177°C). Fit paper liners into a standard twelve-count muffin tin, and line three additional wells in a second pan to accommodate the full batch of fifteen.
- In a medium mixing bowl, vigorously whisk together the flour, natural cocoa powder, baking soda, baking powder, and salt until no clumps remain.
- In a separate, larger bowl equipped with a pouring lip, whisk the vegetable oil, granulated sugar, room-temperature egg, vanilla extract, and buttermilk until the mixture is uniform and smooth.
- Tip the dry flour mixture into the wet ingredients, pour the hot coffee or water over the top, and whisk gently until just combined. Expect a very runny, liquid batter.
- Carefully divide the batter among your prepared liners, filling each cup only two-thirds of the way to prevent the tops from spilling over during baking.
- Bake for 20 to 22 minutes, or until a wooden toothpick inserted directly into the center of a cupcake comes out clean without wet crumbs.
- Let the tins rest on a heatproof surface for ten minutes before turning the cakes out onto a wire rack to cool completely. If the tops feel tacky, slide them into the refrigerator for 20 minutes to firm up before assembly.
- To prepare the frosting, attach the paddle to your electric mixer and beat the softened butter on medium speed for one full minute until creamy. Add the peanut butter and continue beating on medium-high until the mixture is completely integrated.
- Turn the mixer to low, add the confectioners' sugar, heavy cream, vanilla, and salt, mixing for 20 seconds to prevent a sugar cloud, then increase the speed to high and whip for one minute until light and fluffy.
- Take a paring knife and carve a circular plug out of the center of each cooled cake, going down about an inch deep. Trim away the pointed bottom of each cake plug, leaving a flat cap.
- Spoon about one to two teaspoons of the thickened caramel sauce into each hollowed-out cavity, then press the flat cake caps gently back over the caramel.
- Load your peanut butter frosting into a piping bag fitted with a large round tip, swirl it generously over each cupcake, and finish with a drizzle of extra caramel and a scattering of chopped Snickers.
Notes
Keep these critical baking and science tips in mind for the absolute best results:
- Salt Conversion: This recipe was tested using Diamond Crystal kosher salt — 1 tsp = ½ tsp table salt, because the flakes are larger and lighter. If using table salt, cut the measurements in half to avoid over-salting the batter and frosting.
- The Cocoa Science: Do not swap natural cocoa powder for Dutch-process cocoa. Natural cocoa is acidic, which is required to react with the alkaline baking soda to leaven the cupcakes; Dutch-process has been neutralized and will result in flat, dense cakes.
- Preventing Scrambled Eggs: When adding the hot coffee or water to the wet ingredients, pour it in a slow, steady stream while whisking constantly. This tempers the egg and prevents the hot liquid from cooking it.
- Buttermilk Substitute: If you do not have buttermilk, make your own by adding 1 teaspoon of fresh lemon juice or white vinegar to a liquid measuring cup, then filling it with whole milk to the 1/2 cup mark. Let it sit for 5 minutes to curdle before using.
- Caramel Thickness: Ensure your caramel sauce is completely chilled and thick before filling. Warm caramel will soak directly into the cake crumb, making the cupcakes soggy instead of creating a distinct gooey center.
Serving Suggestions
These rich cupcakes are incredibly decadent, meaning they pair beautifully with elements that cut through the fat and sweetness.
- Flaky Sea Salt: Sprinkle a few flakes of Maldon sea salt over the fresh caramel drizzle to balance the sweet peanut butter frosting.
- Bitter Espresso: Serve these alongside a shot of unsweetened espresso or dark roast coffee to contrast the rich, buttery caramel core.
- Chilled Glass of Milk: Go classic with a tall glass of ice-cold whole milk to wash down the sticky peanut butter.
- Chocolate Ganache Drizzle: For an extra layer of luxury, drizzle them with a bit of homemade chocolate ganache for an even richer finish.
Storage and Reheating
Leftovers keep beautifully in the refrigerator, but you must store them in a sealed container so the peanut butter frosting doesn't absorb stray fridge odors. After 24 hours in the cold, the chocolate crumb tightens into a dense, almost fudge-like texture that some testers actually preferred over the room-temperature version.
If you plan to freeze the unfrosted cakes, wrap them individually in plastic wrap before placing them in a heavy-duty freezer bag for up to three months.
Thaw them overnight on the counter.
To store the frosting ahead of time, scoop it into an airtight container and press a sheet of plastic wrap directly onto the surface to prevent a crust from forming. When you are ready to assemble, let it warm up slightly on the counter, then beat it briefly to restore its silky, spreadable consistency. If you have extra frosting, it behaves much like our cookie dough buttercream frosting when stored in the freezer.
Ingredient Substitutes
If you need to swap ingredients, use these tested alternatives to keep the chemistry of the recipe intact:
- Vegetable Oil to Coconut Oil: Substitute melted coconut oil in an exact 1:1 ratio. Technique tweak: Ensure your egg and buttermilk are truly at room temperature, or the coconut oil will solidify into tiny greasy beads when mixed.
- Buttermilk to Sour Cream: Use 1/2 cup of full-fat sour cream or plain Greek yogurt in place of the buttermilk. Technique tweak: Whisk the sour cream thoroughly with the wet ingredients to eliminate any lumps before adding the dry mixture.
- Creamy Peanut Butter to Almond Butter: Swap in smooth, no-stir almond butter at a 1:1 ratio. Technique tweak: Avoid natural "stir" nut butters, as the excess oil will cause the frosting to separate and weep.
- Hot Coffee to Hot Black Tea: Use strong, hot black tea (like Earl Grey) at a 1:1 ratio. Technique tweak: Steep the tea double-strength to mimic the flavor-enhancing depth of coffee without changing the moisture balance.
There is something deeply satisfying about watching a stream of golden caramel disappear into a dark chocolate cupcake. Take your time whipping the frosting to get that perfect, cloud-like texture. Your patience will be rewarded with the ultimate candy bar experience in cake form.
