BakeryDiary is a recipe curation and editorial platform. We research and curate recipes from public sources, considering ratings, reviews, comments, and feedback. We then refine and present them clearly for home cooks. We are committed to an ad-free, focused experience that makes discovering and preparing recipes easier.
These peanut butter cupcakes are a rich, tender treat built around the comforting flavor of creamy peanut butter.
The cupcake batter combines all-purpose flour, brown sugar, peanut butter, canola or vegetable oil, sour cream, whole milk, vanilla, and finely chopped peanuts to create a soft, moist crumb with plenty of nutty flavor.
Brown sugar adds a deep sweetness, while sour cream and milk help keep the cupcakes delicate rather than dry.
The finely crushed peanuts are an especially appealing detail. Chopped very small, they blend naturally into the batter, adding extra peanut flavor without creating large crunchy pieces.
Once baked, the cupcakes are cooled completely before being crowned with a smooth chocolate peanut butter frosting.
The frosting combines softened unsalted butter, confectioners’ sugar, cocoa powder, cream or milk, creamy peanut butter, vanilla, and salt for a rich finish that brings together the classic chocolate-peanut butter combination.
For presentation, the frosting can be piped into a tall swirl and finished with a mini peanut butter cup or chopped peanuts.
The result is an inviting cupcake that feels both familiar and indulgent, making it suitable for parties, celebrations, bake sales, or an everyday dessert when you want something especially satisfying.
The recipe yields about 14 cupcakes and can also be adapted for mini cupcakes.
Moist Peanut Butter Cupcakes
Ingredients
Equipment
Method
- Prepare the Oven and Pans: Preheat the oven to 350°F (177°C), line a 12-cup muffin pan with cupcake liners, and place 2–3 additional liners in a second pan because the recipe yields about 14–15 cupcakes.
- Combine the Dry Ingredients: Whisk the flour, baking soda, and salt together in a medium bowl until evenly combined, then set aside.
- Mix the Wet Ingredients: In a large bowl, use a whisk, handheld mixer, or stand mixer fitted with a whisk or paddle attachment to combine the oil, creamy peanut butter, brown sugar, egg, sour cream, and vanilla extract.
- Finish the Batter: Add the flour mixture, milk, and finely crushed peanuts to the wet mixture, then whisk or beat just until everything is completely combined; avoid overmixing, as the finished batter will be slightly thick.
- Fill the Liners: Spoon or pour the batter into the prepared cupcake liners, filling each one only about two-thirds full to help prevent the batter from baking over the sides.
- Bake the Cupcakes: Bake at 350°F (177°C) for 21–23 minutes, or until a toothpick inserted into the center comes out clean and the cupcake tops spring back gently when touched.
- Cool the Cupcakes: Transfer the baked cupcakes to cool completely before adding the frosting.
- Make the Frosting: Beat the softened butter with a handheld or stand mixer fitted with a paddle or whisk attachment on medium speed for about 2 minutes, until creamy.
- Add the Chocolate Base: Add the confectioners’ sugar, cocoa powder, and heavy cream or milk, then beat on low speed for 30 seconds.
- Add the Peanut Butter: Add the creamy peanut butter, vanilla extract, and salt, then increase the mixer to medium-high speed and beat for 2 minutes, until the frosting is thoroughly combined.
- Adjust the Frosting: If the frosting is too thin, add ¼ cup more confectioners’ sugar; if it is too thick, add another 1–2 tablespoons of cream or milk. Taste and add extra peanut butter or a pinch of salt if desired.
- Frost the Cupcakes: Once the cupcakes are completely cool, frost them using a piping bag; a basic tall swirl can be created with an Ateco #849 piping tip.
- Garnish the Cupcakes: Finish the frosted cupcakes with a mini peanut butter cup or chopped peanuts, if desired.
- Make Mini Cupcakes: For approximately 35 mini cupcakes, use the same 350°F (177°C) oven temperature and bake for about 11–13 minutes.
- Store the Cupcakes: Cover leftover cupcakes and refrigerate them for up to 5 days.
Notes
- Make Ahead: The cupcakes can be prepared 1 day ahead, covered, and kept at room temperature or refrigerated. The frosting can also be prepared 1 day ahead and refrigerated until needed.
- Freezing: Frosted or unfrosted cupcakes can be frozen for 2–3 months. Thaw them overnight in the refrigerator.
- Oil: Melted coconut oil can replace the canola or vegetable oil. Melted butter is not recommended because it does not provide the same moisture.
- Peanut Butter: Processed creamy peanut butter such as Jif or Skippy is recommended for the best texture. Avoid oily or natural-style peanut butter.
- Milk: Whole milk or buttermilk is recommended, although 2% milk and nondairy milk can also be used.
- Peanuts: Chop the peanuts very finely so they blend into the cupcakes and provide peanut flavor without noticeable large pieces. Salted peanuts work especially well for a salty-sweet flavor.
- Room-Temperature Ingredients: Bring refrigerated ingredients to room temperature so the batter combines smoothly and evenly.
- Cake Option: The batter can also be used for an 11 × 7-inch cake or potentially a small two-layer cake. For a larger cake or layer cake, prepare the batter twice rather than doubling the recipe.
Chef’s Secret
The most important detail for getting the intended texture is avoiding overmixing once the flour enters the batter.
After adding the dry ingredients, milk, and finely chopped peanuts, mix only until everything is evenly incorporated.
The batter should remain slightly thick, which is expected. Another useful detail is chopping the peanuts extremely fine.
Larger pieces can interrupt the tender texture, while very finely chopped peanuts distribute their flavor throughout the cupcakes without creating obvious chunks.
Also make sure the cupcakes cool completely before frosting. Warm cupcakes can soften the chocolate peanut butter frosting and make it difficult to create a neat piped swirl.
Following these details helps preserve the soft crumb and polished appearance of the finished cupcakes.
Serving Suggestions
Serve these cupcakes at room temperature for a soft, creamy texture and full peanut butter flavor.
For an attractive finish, top each frosted cupcake with a mini peanut butter cup or a light sprinkle of finely chopped peanuts.
A tall piped swirl makes them especially suitable for parties, celebrations, bake sales, or dessert tables.
They also pair naturally with a glass of cold milk, coffee, or tea.
For a more indulgent presentation, arrange the cupcakes on a serving stand and garnish them just before serving so the toppings remain neat and appealing.
Conclusion
These peanut butter cupcakes combine a soft, moist crumb, rich peanut flavor, and smooth chocolate peanut butter frosting in one irresistible dessert.
The finely chopped peanuts add another layer of flavor, while the optional peanut butter cup garnish gives the finished cupcakes an especially inviting appearance.
Whether prepared for a celebration or simply enjoyed as a homemade treat, this recipe delivers a satisfying balance of chocolate and peanut butter in every bite.
