Watermelon Cupcakes

If you’re looking for a fun, colorful, and delicious treat to make for a Summer party, these watermelon cupcakes are perfect! They’re light, fluffy, and have just the right hint of watermelon flavor. Plus, they look absolutely adorable with their pink frosting and mini chocolate chip “seeds.” Whether you’re baking for a birthday party, a backyard barbecue, or just a sweet weekend treat, these cupcakes are guaranteed to be a hit.

The best part? This recipe is easy enough for beginners but still impressive enough to wow your guests. So, let’s get baking!

Watermelon cupcakes on a white scalloped cake stand

Summer Watermelon Cupcakes

What You’ll Need

  • 1 box of white cake mix
  • 1/3 cup vegetable oil
  • 4 large egg whites
  • 1 ¼ cups water
  • 1 teaspoon clear vanilla extract
  • ½ package of watermelon-flavored gelatin (we found ours at Kroger)
  • Green food coloring
  • Green cupcake liners (Walmart and Amazon have great options!)

  • 2 sticks salted butter, softened
  • 1 teaspoon clear vanilla extract
  • ½ package of watermelon-flavored gelatin
  • 4 cups powdered sugar
  • 1-2 tablespoons half-and-half or whole milk
  • Dark pink and/or red food coloring
  • 1 cup white sanding sugar, divided
  • ½ cup mini chocolate chips
  • 1 large piping bag with a large round frosting tip

Watermelon cupcakes ingredients (1)

How to Make Watermelon Cupcakes

Step 1: Preheat & Prep

Preheat your oven to 350°F. Line a standard muffin tin with green cupcake liners. This will give the cupcakes that perfect watermelon rind look!

Step 2: Mix the Batter

In a large mixing bowl, combine the cake mix, vegetable oil, egg whites, and water. Using a hand or stand mixer, mix on medium speed until everything is well combined.

Watermelon cupcakes mixing of the ingredients

Step 3: Add Flavor & Color

Add in the watermelon gelatin and vanilla extract. Mix until well blended. Then, slowly add in green food coloring, a little at a time, until you get a nice watermelon-rind green.

Step 4: Fill & Bake

Scoop the batter into the cupcake liners, filling each about 2/3 of the way full. Bake for 18-20 minutes or until a toothpick inserted in the center comes out clean.

Batter in cupcake liners

Step 5: Cool Completely

Let the cupcakes cool completely before frosting. If you try to frost warm cupcakes, the frosting will melt right off!

Cooling the watermelon cupcakes

Making the Frosting

Step 6: Cream the Butter

In a large mixing bowl or stand mixer, beat the softened butter until light and fluffy.

creaming the butter

Step 7: Add Flavor & Sugar

Mix in the vanilla extract, remaining watermelon gelatin, and ¼ cup of white sanding sugar.

Watermelon cupcakes mixing of the ingredients

Step 8: Sweeten It Up

Slowly add the powdered sugar, one cup at a time, mixing well after each addition. In between each cup, add a little half-and-half or milk to keep the frosting smooth and creamy.

Watermelon cupcakes mixing of the ingredients

Step 9: Add Color

Mix in dark pink food coloring. If you want a deeper watermelon color, add a little red food coloring too.

Watermelon cupcakes mixing of the ingredients (5)

Step 10: Get Ready to Frost

Prepare your piping bag with a large round frosting tip. Fill the bag with your watermelon-colored frosting.

Step 11: Frost the Cupcakes

Pipe a generous swirl of frosting onto each cooled cupcake.

frosting the cupcakes

Step 12: Add the Final Touches

Sprinkle each cupcake with a bit of the remaining white sanding sugar to give it a sparkly, watermelon-like appearance.

watermelon cupcakes with white sanding sugar sprinkled on top

Step 13: Add “Seeds”

Top each cupcake with mini chocolate chips to resemble watermelon seeds. Adorable and delicious!

watermelon cupcakes with mini chocolate chips on top
watermelon cupcakes on a white plate

Tips for Perfect Watermelon Cupcakes

  • Want a stronger watermelon flavor? You can add a little more gelatin, but we love the subtle flavor in this recipe, it’s not too overpowering!
  • No piping bag? No worries! Just use a zip-top bag with a small hole cut in the corner for an easy DIY piping solution.
  • Make them ahead! You can bake the cupcakes a day in advance and store them in an airtight container. Just frost them right before serving for the best texture.
  • For an extra pop of color, you can add a tiny bit of green food coloring to the cupcake batter after adding the gelatin. This makes the cake look extra vibrant!

These watermelon cupcakes are delicious and a total showstopper! Perfect sweet treat for a Summer birthday party, a picnic, or a BBQ.

View More Cupcake Recipes

Watermelon cupcakes on a white scalloped cake stand

Watermelon Cupcakes

Ingredients
  

For the Cupcake

  • 1 box of white cake mix
  • 1/3 cup vegetable oil
  • 4 large egg whites
  • 1 ¼ cups water
  • 1 teaspoon clear vanilla extract
  • ½ package of watermelon-flavored gelatin we found ours at Kroger
  • Green food coloring
  • Green cupcake liners Walmart and Amazon have great options!

For the Frosting

  • 2 sticks salted butter softened
  • 1 teaspoon clear vanilla extract
  • ½ package of watermelon-flavored gelatin
  • 4 cups powdered sugar
  • 1-2 tablespoons half-and-half or whole milk
  • Dark pink and/or red food coloring
  • 1 cup white sanding sugar divided
  • ½ cup mini chocolate chips
  • 1 large piping bag with a large round frosting tip

Instructions
 

  • Preheat your oven to 350°F. Line a standard muffin tin with green cupcake liners. This will give the cupcakes that perfect watermelon rind look!
  • In a large mixing bowl, combine the cake mix, vegetable oil, egg whites, and water. Using a hand or stand mixer, mix on medium speed until everything is well combined.
  • Add in the watermelon gelatin and vanilla extract. Mix until well blended. Then, slowly add in green food coloring, a little at a time, until you get a nice watermelon-rind green.
  • Scoop the batter into the cupcake liners, filling each about 2/3 of the way full. Bake for 18-20 minutes or until a toothpick inserted in the center comes out clean.
  • Let the cupcakes cool completely before frosting. If you try to frost warm cupcakes, the frosting will melt right off!
  • In a large mixing bowl or stand mixer, beat the softened butter until light and fluffy.
  • Mix in the vanilla extract, remaining watermelon gelatin, and ¼ cup of white sanding sugar.
  • Slowly add the powdered sugar, one cup at a time, mixing well after each addition. In between each cup, add a little half-and-half or milk to keep the frosting smooth and creamy.
  • Mix in dark pink food coloring. If you want a deeper watermelon color, add a little red food coloring too.
  • Prepare your piping bag with a large round frosting tip. Fill the bag with your watermelon-colored frosting.
  • Pipe a generous swirl of frosting onto each cooled cupcake.
  • Sprinkle each cupcake with a bit of the remaining white sanding sugar to give it a sparkly, watermelon-like appearance.
  • Top each cupcake with mini chocolate chips to resemble watermelon seeds. Adorable and delicious!

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