St Patricks Day Rainbow Bars (Printable Version)

Buttery bars with colorful sprinkles and white chocolate chips, ideal for festive occasions.

# Ingredient List:

→ 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

# Steps:

01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, leaving an 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 -
  • They're impossibly easy and require no special skills, just a bowl and a spatula.
  • Kids can help press sprinkles into the top, making them perfect for actual celebration prep.
  • One pan means less cleanup, which feels like a small miracle when you're juggling a party.
02 -
  • Overbaking is the enemy—these bars go from perfect to dry in about two minutes, so err on the side of slightly underdone.
  • Cutting while still warm will create crumbles, but cutting when completely cold yields clean, presentable bars every time.
03 -
  • Use parchment paper with edges that overhang your pan—it's the single best investment in clean, easy bar removal.
  • Let melted butter cool slightly before adding eggs so the heat doesn't cook them; warm batter is the enemy of tender results.
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