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Oatmeal Cream Pie Cupcakes bring together the cozy flavors of a spiced cake and the nostalgic sweetness of oatmeal cream pie cookies in one irresistible dessert.
Made with a boxed spice cake mix enhanced with brown sugar, cinnamon, nutmeg, and vanilla, these cupcakes have a warm, fragrant flavor and a soft, tender texture.
Buttermilk and sour cream add moisture and richness, creating a deliciously fluffy cake that pairs beautifully with the creamy frosting.
The real highlight is the marshmallow-cinnamon frosting, which combines softened butter, marshmallow fluff, vanilla extract, powdered sugar, and heavy whipping cream.
A touch of cinnamon adds extra warmth, while a small pinch of salt balances the sweetness.
Crushed oatmeal cream pies are folded into the frosting, bringing their signature cookie flavor and a delightful crumbly texture to every bite.
These cupcakes are a wonderful choice for birthdays, holiday gatherings, bake sales, potlucks, or whenever you want to serve something a little more special than an everyday cupcake.
Their inviting spice aroma, sweet marshmallow topping, and familiar oatmeal cookie flavor make them especially appealing to anyone who enjoys classic bakery-style treats.
Another advantage is that this recipe uses a boxed spice cake mix as its starting point, making preparation straightforward without sacrificing flavor.
The batter comes together with a handful of simple additions, and the frosting transforms ordinary cupcakes into a memorable dessert.
Once cooled and generously frosted, each cupcake delivers a lovely combination of warm spices, buttery richness, fluffy sweetness, and oatmeal cream pie crumbs.
Whether served at a celebration or enjoyed as an afternoon treat, these Oatmeal Cream Pie Cupcakes offer a comforting, cookie-inspired twist on a familiar favorite.
Sweet Oatmeal Cream Cupcakes
Ingredients
Equipment
Method
- Prepare the Oven and Pan: Preheat the oven to 350°F (175°C). Line a muffin pan with cupcake liners, preparing enough for 24 cupcakes.
- Mix the Cake Batter: Combine the spice cake mix, eggs, buttermilk, vegetable oil, and sour cream in a mixing bowl. Beat with an electric mixer on medium speed until the ingredients are just combined.
- Add the Spices and Flavorings: Add the vanilla extract, cinnamon, nutmeg, and light brown sugar to the batter. Continue mixing until everything is evenly incorporated.
- Fill the Cupcake Liners: Divide the batter among the prepared cupcake liners, filling each approximately two-thirds full to allow room for the cupcakes to rise.
- Bake the Cupcakes: Place the muffin pan in the preheated oven and bake for 15–18 minutes. Check for doneness by inserting a toothpick into the center of a cupcake. If it comes out clean, the cupcakes are ready.
- Cool the Cupcakes: Let the cupcakes rest in the pan for 5 minutes before transferring them to a wire rack. Allow them to cool completely before adding the frosting.
- Crush the Oatmeal Cream Pies: Place the seven oatmeal cream pies in a food processor and process until they become fine crumbs. Set the crumbs aside for the frosting.
- Cream the Butter: Place the softened, room-temperature butter in the bowl of a stand mixer fitted with the paddle attachment. Beat for several minutes until the butter is smooth and creamy. Make sure the butter is softened but not melted.
- Blend in the Marshmallow Fluff: Add the entire 7-ounce jar of marshmallow fluff to the creamed butter. Beat until the mixture is smooth and well combined.
- Add the Vanilla Extract: Pour the vanilla extract into the butter and marshmallow mixture. Mix until evenly incorporated.
- Incorporate the Powdered Sugar: Add the powdered sugar in batches of approximately 2 cups at a time, mixing well after each addition. Use 4–5 cups in total, depending on the desired consistency. The original recipe uses 5 cups for a firmer frosting.
- Mix in the Heavy Cream: Add the heavy whipping cream and beat until it is fully incorporated into the frosting. This helps create a creamier texture and balances the sweetness of the powdered sugar and marshmallow fluff.
- Season the Frosting: Add the ground cinnamon and a pinch of salt. Mix until both ingredients are evenly distributed throughout the frosting.
- Fold in the Cookie Crumbs: Add the crushed oatmeal cream pie crumbs to the frosting. Beat on low speed just until the crumbs are incorporated.
- Frost the Cooled Cupcakes: Once the cupcakes have cooled completely, spread or pipe the prepared frosting over them. Serve the finished cupcakes when ready.
Notes
- Cake Mix: Use one standard box of spice cake mix as the base for the cupcakes. The added cinnamon, nutmeg, and brown sugar deepen the warm spice flavor.
- Room-Temperature Ingredients: Allow the butter to soften before preparing the frosting so it creams smoothly without melting.
- Filling the Liners: Fill each cupcake liner approximately two-thirds full to leave room for the batter to rise.
- Check for Doneness: Begin checking the cupcakes at 15 minutes. Insert a toothpick into the center; if it comes out clean, the cupcakes are ready.
- Cool Completely: Let the cupcakes cool for 5 minutes in the pan, then transfer them to a wire rack. Frost only after they have cooled completely.
- Frosting Consistency: Add 4–5 cups of powdered sugar, mixing in batches. Use 5 cups for a firmer frosting, as specified in the original recipe.
- Cookie Crumbs: Process the oatmeal cream pies into small crumbs so they distribute more evenly throughout the frosting.
- Mix Gently: Add the cookie crumbs at the end and mix on low speed to incorporate them without unnecessarily overmixing the frosting.
Chef’s Secret
For the most flavorful frosting, pay attention to the texture of the oatmeal cream pie crumbs.
Process the cookies until they form small, fairly even crumbs rather than leaving large chunks.
Smaller crumbs distribute more consistently throughout the marshmallow-butter mixture, giving each cupcake a balanced combination of cinnamon frosting and oatmeal cookie flavor.
Make sure the butter is softened enough to blend smoothly but is not melted, since melted butter can make the frosting difficult to whip into a creamy consistency.
When adding the powdered sugar, incorporate it gradually and assess the texture before adding the final portion.
The full 5 cups will produce the firmer frosting described in the original recipe, which is especially useful if you plan to pipe decorative swirls onto the cooled cupcakes.
Serving Suggestions
Serve these Oatmeal Cream Pie Cupcakes as a sweet finish to a family meal, at birthday parties, or on a holiday dessert table.
Their warm cinnamon and nutmeg flavors pair nicely with a cup of freshly brewed coffee, black tea, or a glass of cold milk.
For an attractive presentation, pipe the marshmallow-cinnamon frosting into swirls and finish with a light dusting of cinnamon or a sprinkle of finely crushed oatmeal cream pie crumbs.
You can also arrange the cupcakes on a tiered dessert stand alongside simple vanilla cookies or other lightly spiced baked treats.
For casual gatherings, serve them individually in their paper liners for easy handling.
Allow the cupcakes to reach a comfortable serving temperature before enjoying them so the cake remains tender and the frosting creamy.
Conclusion
Oatmeal Cream Pie Cupcakes combine soft, warmly spiced cake with rich marshmallow-cinnamon frosting and the familiar sweetness of oatmeal cream pie cookies.
The boxed spice cake mix keeps preparation straightforward, while the homemade frosting gives these cupcakes their distinctive flavor and texture.
Whether you’re preparing a batch for a celebration, sharing them with friends, or treating yourself to a cozy homemade dessert, these cupcakes offer a delicious way to enjoy a beloved cookie-inspired flavor in cupcake form.
