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Fireworks Cupcakes

Fireworks cupcakes with tall swirled vanilla buttercream peaks, finished with red and blue star sprinkles and a sparkler pick for a 4th of July burst. Made using boxed vanilla cake mix and tri-color gel buttercream piped in a dramatic swirl.
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Prep Time 30 minutes
Cook Time 20 minutes
Total Time 50 minutes
Servings: 24 servings
Course: Dessert
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

Cupcakes (baked from box mix)
  • 1 box white or vanilla cake mix Use the cake mix and the eggs, oil, and water called for on the box.
Vanilla buttercream
  • 1 cup unsalted butter Softened.
  • 4 cup powdered sugar
  • 2 tsp vanilla extract
  • 3.5 tbsp heavy cream Start with 3 tablespoons; add up to 4 tablespoons for spreadable consistency.
  • 1 red and blue gel food coloring Use to color frosting one portion red and one portion blue.
  • 1 red, white, and blue star sprinkles
  • 1 sparkler picks or flag picks For inserting into the center as a firework effect.

Equipment

  • 1 sheet pan
  • 1 stand mixer
  • 1 piping bag

Method
 

Bake and cool
  1. Bake the cupcakes according to package directions in lined muffin tins until a toothpick comes out clean, about 18–22 minutes. Cool completely on a wire rack so frosting won’t melt.
Make the buttercream
  1. Beat the softened unsalted butter until fluffy, about 1–2 minutes, in a stand mixer. Scrape the bowl as needed.
  2. Gradually add powdered sugar with the mixer on low, then increase to medium to combine, about 2 minutes. Mix until smooth with no dry pockets.
  3. Add vanilla extract and 3 tablespoons heavy cream, then beat on high for 3 minutes until very light and fluffy. If needed, add more heavy cream (up to 1 tablespoon) to reach a pipeable texture.
Color and pipe tri-color swirls
  1. Divide the buttercream into three portions, leaving one white, coloring one portion red, and coloring one portion blue with gel food coloring. Mix each portion until the color is even.
  2. Load a piping bag fitted with a large star tip with the three colors side by side for a tri-color swirl. Keep the bag tightly packed for clean stripes.
  3. Pipe a tall swirled peak onto each cooled cupcake, holding steady and finishing with a quick upward pull. Aim for a dramatic tower shape like a firework burst.
Finish with sprinkles and sparkler picks
  1. Shower each cupcake with red, white, and blue star sprinkles over the frosting peaks. Let some sprinkles cascade down the sides for the fireworks look.
  2. Insert a sparkler pick into the center of each cupcake, pushing gently into the frosting so it stands up. Serve immediately while the effect is fresh.

Notes

Pro tip: Keep cupcakes completely cool before piping—warm cakes will cause the buttercream to slide. Store cupcakes covered in the refrigerator up to 2 days; bring to room temperature for the best frosting texture. For freezing, freeze unfrosted cupcakes up to 2 months (thaw, then frost); buttercream can be frozen and re-whipped after thawing. Dietary swap: Use a vanilla cake mix labeled egg-free and adjust the mix additions per the box for an egg-free option (but keep the frosting dairy unless you substitute plant-based butter and cream).