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Fireworks Cupcakes

Fireworks cupcakes are tall, swirled vanilla cupcakes topped with dramatic buttercream peaks, star sprinkles, and a sparkler stick for a firework burst look. Made with an easy cake-mix base and a fluffy three-color buttercream swirl, they’re a showy 4th of July red, white, and blue dessert.
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Prep Time 30 minutes
Cook Time 20 minutes
Total Time 50 minutes
Servings: 24 servings
Course: Dessert
Cuisine: American
Calories: 420
Ingredients Equipment Method Notes

Ingredients
  

Cake mix cupcakes
  • 1 box white or vanilla cake mix Use the ingredients listed on the box for eggs, water, and oil/butter.
Vanilla buttercream
  • 1 cup unsalted butter Softened.
  • 4 powdered sugar
  • 2 tsp vanilla extract
  • 3.5 tbsp heavy cream Start with 3 tbsp and add up to 4 tbsp for pipeable texture.
  • 1 red and blue gel food coloring Color only as needed for red and blue portions.
  • 1 red, white, and blue star sprinkles
  • 1 sparkler picks or flag picks For decoration.

Equipment

  • 1 sheet pan

Method
 

Bake and cool the cupcakes
  1. Bake cupcakes according to package directions in lined muffin tins, using the box’s listed eggs and liquids. Bake until a toothpick comes out clean, then cool completely on a wire rack.
Make the buttercream
  1. Beat the softened unsalted butter until fluffy. This should take about 1 to 2 minutes at room temperature, until noticeably lighter in color.
  2. Gradually add powdered sugar, then add vanilla extract and heavy cream. Beat until fully combined and smooth, scraping the bowl as needed.
  3. Beat the buttercream on high for 3 minutes until very light and fluffy. Stop once it looks airy and holds ridges, not runny.
Color and set up a tri-color piping bag
  1. Divide the buttercream into three portions, leaving one white and coloring the other two red and blue with gel food coloring. Mix each portion until the color is even and bold.
  2. Load a piping bag fitted with a large star tip with all three colors side by side for a tri-color swirl. Keep the colors together so they pipe in distinct bands.
Pipe, sprinkle, and decorate
  1. Pipe a tall swirled peak of frosting onto each cooled cupcake. Use steady upward pressure and finish with a quick stop at the top for a dramatic point.
  2. Shower each cupcake with red, white, and blue star sprinkles. Then insert a sparkler pick into the center and serve immediately for the firework look.

Notes

Pro tip: Add heavy cream a tablespoon at a time until the buttercream is thick but pipes cleanly—over-warm frosting will collapse the peak. Store cupcakes in an airtight container in the refrigerator up to 3 days; bring to room temperature for about 20 to 30 minutes before serving. Freezing is yes: freeze undecorated or decorated without the sparkler picks up to 2 months, then thaw overnight in the fridge. For a lighter option, replace half the butter with additional powdered sugar only if you keep the texture pipeable (do not reduce too far or the peaks won’t hold).