St Patricks Rainbow Bars

St. Patrick's Day deserves a celebration as colorful and joyful as the holiday itself, and these Rainbow Cookie Bars deliver exactly that. Buttery, tender, and loaded with festive rainbow sprinkles and sweet white chocolate chips, these bars bring the magic of the holiday to your dessert table. Whether you're hosting a party, packing treats for friends, or simply want to add a splash of color to your day, these easy-to-make bars are the perfect way to spread St. Patrick's Day cheer.

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What makes these cookie bars truly special is their simplicity paired with their stunning visual appeal. The combination of melted butter, brown sugar, and vanilla creates a rich, cookie-like base that's neither too cakey nor too dense. The rainbow sprinkles—especially when you choose green, gold, and traditional rainbow colors—add both texture and a festive St. Patrick's Day theme. And those pockets of melted white chocolate? They transform each bite into a sweet, indulgent treat that both kids and adults will love.

Ingredients

• 2 cups (250 g) all-purpose flour
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• 3/4 cup (170 g) unsalted butter, melted and cooled
• 1 cup (200 g) granulated sugar
• 1/2 cup (100 g) light brown sugar, packed
• 2 large eggs
• 2 teaspoons pure vanilla extract
• 3/4 cup (130 g) white chocolate chips
• 1/2 cup (80 g) rainbow sprinkles, divided (use green, gold, and rainbow for St. Patricks Day theme)

Instructions

Step 1: Prepare the Pan

Preheat the oven to 350°F (175°C). Line a 9x9-inch (23x23 cm) baking pan with parchment paper, leaving an overhang for easy removal.

Step 2: Mix Dry Ingredients

In a medium bowl, whisk together flour, baking powder, and salt. Set aside.

Step 3: Combine Wet Ingredients

In a large bowl, whisk melted butter, granulated sugar, and brown sugar until smooth. Add eggs and vanilla extract; whisk until fully combined.

Step 4: Form the Batter

Gradually fold the dry ingredients into the wet ingredients with a spatula, mixing until just combined.

Step 5: Add Mix-Ins

Stir in the white chocolate chips and 1/3 cup of the rainbow sprinkles.

Step 6: Prepare for Baking

Spread the batter evenly into the prepared pan. Sprinkle the remaining sprinkles over the top.

Step 7: Bake

Bake 25–28 minutes, or until the edges are golden and a toothpick inserted into the center comes out mostly clean.

Step 8: Cool and Serve

Cool completely in the pan on a wire rack before slicing into bars.

Zusatztipps für die Zubereitung

For the best texture, make sure your melted butter has cooled slightly before mixing it with the sugars—this prevents the eggs from cooking when added. When folding the dry ingredients into the wet, mix just until no flour streaks remain to keep the bars tender and not overly dense. Don't skip the parchment paper overhang; it makes removing and slicing the bars much easier and cleaner. For perfectly even bars, use a bench scraper or large knife and wipe it clean between cuts.

Varianten und Anpassungen

These cookie bars are wonderfully adaptable. Swap white chocolate chips for milk chocolate, dark chocolate, or even butterscotch chips for a different flavor profile. If you want to emphasize the St. Patrick's Day theme even more, use exclusively green and gold sprinkles or add a few drops of green food coloring to the batter. For a richer treat, drizzle melted white chocolate over the cooled bars and top with small shamrock candies. You can also add 1/2 cup of chopped nuts like pecans or walnuts for extra crunch and depth.

Serviervorschläge

These Rainbow Cookie Bars are perfect on their own, but they pair beautifully with a cold glass of milk or a hot cup of coffee. Serve them on a festive platter at St. Patrick's Day parties, pack them in treat bags for school celebrations, or wrap individual bars in cellophane tied with green ribbon for sweet gifts. They also make a delightful addition to a dessert board alongside sugar cookies, brownies, and other handheld treats. For an extra special touch, serve them with a scoop of vanilla ice cream and a drizzle of caramel sauce.

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These St. Patrick's Day Rainbow Cookie Bars are more than just a dessert—they're a celebration in every bite. With their vibrant colors, buttery richness, and sweet white chocolate surprises, they capture the festive spirit of the holiday while remaining simple enough for bakers of all skill levels. Whether you're honoring Irish traditions or simply looking for a fun, colorful treat to brighten your day, these bars deliver joy, flavor, and plenty of smiles. So gather your ingredients, preheat that oven, and get ready to create a batch of magic that's as delicious as it is delightful.