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Spring Confetti Bars

Spring Confetti Bars made with spring-colored M&M's, white chocolate, spring sprinkles, and gooey marshmallows. These easy dessert bars are sure to please a crowd!
Course Dessert, Snack
Cuisine American
Keyword confetti bars
Prep Time 25 minutes
Cook Time 24 minutes
Allow bars to set 1 hour
Total Time 1 hour 49 minutes
Servings 24 bars
Calories 206kcal
Cost $6.32


  • 12 tablespoons (170g) unsalted butter, at room temperature
  • 1 cup (205g) white granulated sugar
  • 1/2 cup (100g) light brown sugar, lightly packed
  • 1 large egg
  • 1 large egg yolk
  • 2 teaspoons vanilla extract
  • 2 cups + 2 tablespoons (300g) white all-purpose flour
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon fine sea salt
  • 1 and 1/4 cups white chocolate chips, divided (1 cup is 160g)
  • 3 cups (137g) miniature marshmallows
  • 3/4 cup (152g) spring-colored M&M's
  • 1-3 tablespoons spring-colored sprinkles (See Note 1)


  • PREP: Preheat the oven to 350 degrees F. Grease a 9x13-inch pan with cooking spray and line with parchment paper (I don't recommend lining with foil). These bars are sticky so you do want the parchment paper.
  • WET INGREDIENTS: In a large bowl, combine 12 tablespoons room-temperature butter with the 1 cup white sugar and 1/2 cup light brown sugar in a medium sized bowl. Beat with hand mixer (or in a stand mixer) until light and creamy. Add in the egg, egg yolk, and 2 teaspoons vanilla. Mix until combined.
  • DRY INGREDIENTS: In a separate large bowl, combine the 2 cups + 2 tablespoons white flour, 1/2 teaspoon baking soda, and 1/2 teaspoon salt. Stir. Add wet ingredients to dry ingredients and stir until just combined. With a wooden spoon, stir in 1 cup of white chocolate chips and stir until combined.
  • BAKE: Press the cookie dough into the prepared 9x13-inch pan. Bake the bars for 22-26 minutes or until the top is no longer glossy and edges are ever-so-slightly browned. Remove from the oven and immediately top with the miniature marshmallows. Return to the oven for 1 minute and 30 seconds.
  • FINISHING: Gently press the marshmallows down a little. Sprinkle the remaining 1/4 cup white chocolate chips evenly over the bars. Sprinkle the 3/4 cup M&M's evenly over the bars. Scatter the sprinkles evenly over the bars.
  • SERVE: Let cool completely (these bars take 1-3 hours to really set up) and then cut with a hot, sharp knife (run the knife under hot water, dry, make a slice, repeat). Confetti Bars are best enjoyed within 1-2 days; after that the marshmallows become unpleasant.



Note 1: Sprinkles: Use 1 tablespoon nonpareil sprinkles or 2-3 tablespoons jimmies sprinkles.


Serving: 24bars | Calories: 206kcal | Carbohydrates: 30.4g | Protein: 2.2g | Fat: 8.7g | Cholesterol: 32.3mg | Sodium: 19.7mg | Fiber: 0.3g | Sugar: 20.9g