Birthday Cake Blondies

Birthday cake blondies with white chocolate chips are like a party in dessert form. They’re soft, chewy, and packed with that irresistible birthday cake flavor, thanks to a splash of vanilla and rainbow sprinkles. The white chocolate chips melt perfectly into each bite, adding a creamy sweetness that takes these blondies to the next level. Whether you’re celebrating or just in the mood for a little joy, these treats are like edible confetti – colorful, fun, and full of happiness. They’re easy to whip up, shareable, and totally guaranteed to make anyone smile.

These birthday cake blondies are the perfect way to enjoy all the fun of birthday cake without the fuss of baking and decorating an actual cake. No layers to frost, no messy crumbs to deal with—just a simple, one-bowl wonder that gives you all the sweet, cake-like flavor you crave. The rainbow sprinkles bring that festive vibe, while the white chocolate chips give it an extra pop of sweetness. It’s a fun, no-stress alternative to traditional cake that’s still packed with all the flavor and celebration! Plus, these blondies are great for serving a crowd without the need for cutting slices. Just grab one (or two) and go!

I love making and eating birthday cake blondies because they remind me of the joy and excitement of celebrating with friends and family but without the pressure of a complicated cake. The simple, nostalgic flavor always brings a smile to my face, and there’s something so comforting about the mix of vanilla, sprinkles, and white chocolate chips—it feels like a warm hug in dessert form! Plus, they’re so easy to make, it’s the perfect excuse to indulge in a sweet treat without spending hours in the kitchen.

I may be a little biased because I LOVE birthday cake flavored everything, but give these a try and let me know in the comments below how you like them!

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Birthday Cake Blondies

Yield: 16

Author: Jaegar Desjardin

Prep time: 20 MinCook time: 30 MinTotal time: 50 Min

Birthday cake-flavored blondies are soft, buttery treats with a chewy texture infused with vanilla and sprinkles that mimic a birthday cake's festive, sweet taste. The vibrant, colorful sprinkles add a fun, celebratory touch to the rich, golden flavor.

Ingredients

• ½ cup unsalted butter (melted)
• 1 cup brown sugar
• 2 eggs (room temperature)
• 1 tbsp vanilla extract
• 1 cup of all-purpose flour
• ¼ tsp of baking powder
• ½ tsp salt
• 1 cup white chocolate chips
• 4 tbsp Rainbow Sprinkles

For the frosting

• ¼ cup softened unsalted butter
• 2 tbsp softened cream cheese
• 1 ½ cup powdered sugar
• ¼ tsp salt
• 1 tsp vanilla bean paste
• 1 tbsp milk

Instructions

1. Preheat the oven to 350 degrees and line a 9x9 pan with parchment paper.
2. Melt the ½ cup of butter and allow to cool slightly.
3. Add the melted butter and brown sugar in a separate bowl and mix with a spatula until combined.
4. Add the eggs and vanilla extract and mix until just combined.
5. Use a spatula to scrape down the sides and add the flour, baking powder, and salt. Fold the ingredients together until there are no clumps of flour without overmixing. Then add one cup of white chocolate chips and four tablespoons of rainbow sprinkles, mix, then transfer to your baking pan.
6. Bake for 30-35 minutes or until the edges are golden brown.
7. While the blondies cool, make the frosting. Add the softened butter and cream cheese in a stand mixer (or hand mixer). Mix on medium to medium-high speed until combined. Add the powdered sugar, salt, vanilla bean paste, and milk. Mix the ingredients until nice and creamy, roughly 2-4 minutes.
8. Once the blondies are cooled enough, top them with the frosting and add some extra sprinkles if you want!
9. Serve and Enjoy!

Equipment

1. 9x9 baking pan
2. Parchment paper
3. Wire rack
4. Spatula
5. Bowls

Notes

• If you don't have vanilla bean paste for the frosting, vanilla extract will also work!