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Fireworks Blondies

Fireworks blondies are thick, chewy, golden squares baked with red, white, and blue star sprinkles and M&Ms for bold 4th of July color in every bite. This easy blondie recipe bakes until set on top with a faint jiggle in the center for that signature chewy texture.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings: 16 servings
Course: Dessert
Cuisine: American
Calories: 310
Ingredients Equipment Method Notes

Ingredients
  

Wet base
  • 0.5 cup unsalted butter Melted.
  • 1 cup brown sugar Packed.
  • 1 large egg
  • 1 egg yolk
  • 2 tsp vanilla extract
Dry ingredients
  • 1 cup all-purpose flour
  • 0.5 tsp baking powder
  • 0.25 tsp salt
Mix-ins
  • 0.5 cup red, white, and blue M&Ms
  • 0.33 cup red and blue star sprinkles Plus extra for topping.
  • 0.25 cup white chocolate chips

Equipment

  • 1 sheet pan

Method
 

Prep the pan and oven
  1. Preheat the oven to 350°F and line an 8x8 baking pan with parchment paper, leaving overhang for easy lifting later.
Make the blondie batter
  1. Whisk melted butter and brown sugar together until smooth.
  2. Add the large egg, egg yolk, and vanilla extract, then whisk until glossy.
  3. Stir in all-purpose flour, baking powder, and salt until just combined—do not overmix.
  4. Fold in the red, white, and blue M&Ms, red and blue star sprinkles, and white chocolate chips.
Bake
  1. Spread the batter evenly into the prepared pan and scatter extra red and blue star sprinkles on top.
  2. Bake for 22–25 minutes at 350°F until the top is golden and set but the center still has a very slight jiggle.
  3. Cool the blondies completely in the pan before cutting into squares, since they firm up as they cool.

Notes

For the chewiest centers, pull the blondies when the middle still jiggles slightly—residual heat will finish the bake. Store airtight at room temperature up to 3 days or in the fridge up to 5 days; freeze baked squares up to 2 months. For a gluten-free swap, use a 1:1 gluten-free all-purpose flour blend (baking powder and amounts stay the same).