Ingredients
Method
To Make the Cupcakes
- Preheat oven to 350°F (175°C). Line muffin tin with cupcake liners.
- In a mixing bowl, combine cake mix, eggs, buttermilk, oil, and sour cream. Mix until smooth.
- Add vanilla extract, cinnamon, nutmeg, and brown sugar. Stir until just combined.
- Fill each cupcake liner about ⅔ full. Bake for 15 to 18 minutes.
- Let cupcakes cool in the pan for 5 minutes, then move to a wire rack to cool completely.
To Make the Frosting
- Use a food processor to grind the oatmeal cream pies into fine crumbs.
- In a stand mixer, beat butter on medium-high until light and smooth.
- Add marshmallow fluff and vanilla extract. Beat until creamy.
- Gradually add powdered sugar, one cup at a time, and mix until fluffy.
- Add heavy cream, cinnamon, and salt. Mix until frosting reaches spreadable consistency.
- Fold in the oatmeal cream pie crumbs until evenly combined.
To Frost and Serve
- Spread or scoop the frosting generously onto each cooled cupcake.
- Optionally garnish with extra oatmeal cream pie crumbs or a mini cookie piece.
Notes
- These oatmeal cream pie cupcakes are best enjoyed the same day but can be stored in the refrigerator for up to 3 days.
- Let cupcakes sit at room temperature before serving for the best texture.
- You can freeze the unfrosted cupcakes for up to 2 months and thaw before use.
- The frosting is thick and textured—best applied with a spoon or spatula, not a piping bag.
Nutritional Facts (Per Cupcake – Approximate)
Nutrient | Amount |
---|---|
Calories | 410 kcal |
Total Fat | 21 g |
Saturated Fat | 12 g |
Carbohydrates | 52 g |
Sugar | 38 g |
Protein | 3 g |
Fiber | 1 g |
Sodium | 220 mg |