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Sanderson Sisters Cupcakes

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Ingredients

Scale

Chocolate cupcakes

  • 1 box (15.25 oz) chocolate cake mix
  • 1 cup buttermilk
  • 3 large eggs + 1 egg yolk
  • ½ cup vegetable oil
  • 2 tablespoons sour cream
  • 1 teaspoon vanilla extract
  • 1 teaspoon espresso powder (optional, but enhances the chocolate flavor)

Marshmallow creme filling

  • ½ cup (1 stick) unsalted butter, softened
  • 1 jar (7 oz) marshmallow creme
  • 1 cup powdered sugar
  • 1 teaspoon vanilla extract
  • Food coloring: green (Winnie), maroon/red (Mary), purple (Sarah)

Chocolate frosting

  • 1 cup (2 sticks) salted butter, softened
  • 3 ½ cups powdered sugar
  • ½ cup unsweetened cocoa powder
  • ½ teaspoon salt
  • 2 teaspoons vanilla extract
  • ¼ cup heavy cream (add more if needed)

Toppings

Instructions

  1. Preheat the oven according to the cake mix package (usually 350°F). Line muffin tins with 24 cupcake liners.
  2. In a large bowl, whisk together buttermilk, eggs, yolk, oil, sour cream, vanilla, and espresso powder until smooth.
  3. Add the cake mix and stir until just combined (do not overmix).
  4. Divide the batter among cupcake liners, filling about ⅔ full.
  5. Bake as directed on the box, checking a few minutes early.
  6. Let cupcakes cool completely.
  7. For the filling, beat the butter until light and fluffy.
  8. Mix in the marshmallow creme and vanilla.
  9. Slowly add the powdered sugar, beating until smooth and fluffy.
  10. Divide into 3 bowls. Tint one green for Winnie, one maroon/red for Mary, and one purple for Sarah.
  11. Using a small knife or cupcake corer, cut a small hole in the center of each cooled cupcake.
  12. Fill with the colored creme fillings, dividing cupcakes into three equal groups (8 of each Sanderson sister).
  13. Replace the cake “plug” on top to seal.
  14. For the frosting, beat the butter until creamy.
  15. Add in the powdered sugar, cocoa powder, and salt. Mix on low.
  16. Add in the vanilla and cream, then beat on medium-high for about 3 minutes until smooth and fluffy.
  17. Frost each cupcake with chocolate buttercream—either spread or pipe.
  18. Top with black sprinkles and themed toppers. Spray with edible glitter, if desired.
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