St. Patricks Day Rainbow Bars (Printer View)

Buttery bars with sprinkles and white chocolate chips make a colorful, festive treat for celebrations.

# What you'll need:

→ Dry Ingredients

01 - 2 cups all-purpose flour
02 - 1/2 teaspoon baking powder
03 - 1/4 teaspoon salt

→ Wet Ingredients

04 - 3/4 cup unsalted butter, melted and cooled
05 - 1 cup granulated sugar
06 - 1/2 cup light brown sugar, packed
07 - 2 large eggs
08 - 2 teaspoons pure vanilla extract

→ Mix-Ins

09 - 3/4 cup white chocolate chips
10 - 1/2 cup rainbow sprinkles, divided

# Method:

01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, leaving overhang for easy removal.
02 - In a medium bowl, whisk together flour, baking powder, and salt. Set aside.
03 - In a large bowl, whisk melted butter, granulated sugar, and brown sugar until smooth. Add eggs and vanilla extract; whisk until fully combined.
04 - Gradually fold the dry ingredients into the wet ingredients with a spatula, mixing until just combined.
05 - Stir in the white chocolate chips and 1/3 cup of the rainbow sprinkles.
06 - Spread the batter evenly into the prepared pan. Sprinkle the remaining sprinkles over the top.
07 - Bake 25-28 minutes, or until the edges are golden and a toothpick inserted into the center comes out mostly clean.
08 - Cool completely in the pan on a wire rack before slicing into bars.

# Expert Advice:

01 -
  • Quick and easy to prepare in just 45 minutes from start to finish
  • Festive and colorful, perfect for St. Patrick's Day celebrations
  • Uses simple pantry staples you likely already have on hand
  • Soft, buttery texture with pockets of melted white chocolate
  • Great for parties, classroom treats, or family gatherings
  • Easily customizable with different sprinkles or chocolate chips
02 -
  • Use room temperature eggs for easier mixing and better incorporation into the batter
  • Line the pan with parchment paper extending over the edges to lift the bars out easily for clean slicing
  • Don't overbake—remove the bars when the edges are golden and the center is just set for the softest texture
  • Store bars in an airtight container at room temperature for up to 4 days, or freeze for up to 2 months
  • For festive flair, add a drizzle of melted white chocolate or decorate with small shamrock candies after cooling
  • If the batter seems thick, this is normal—it will spread during baking to create perfectly chewy bars
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