Birthday Cake Blondies

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  • Difficulty Level: Beginner
  • Occasions: Birthday, Everyday, Summer Party, Kids Party

What do you get when you add sprinkles and white chocolate goodness to classic blondies? The yummiest party treats ever (they turn everything into a celebration!)

Jyoti (@thepurplecupcake_)'s Birthday Cake Blondies transform classic blondies into extra fun treats with white chocolate, sprinkles and even Oreos added to the mix! They're topped off with a deliciously rich vanilla bean buttercream, confetti cake chunks, and a sweet white chocolate ganache drizzle (are you drooling yet? ;))

ingredients image squiggle



  • 115 g unsalted butter, melted and cooled 
  • 225 g brown sugar 
  • 1 egg 
  • 1 tbsp vanilla extract 
  • 140 g a/p flour
  • Pinch of salt 
  • 1/4 tsp baking powder
  • 1 tsp corn starch (this ensures softness)
  • 50 g white chocolate chips (I use Callebaut)
  • 40 g chopped Oreos 
  • 30 g sprinkles

Read It!

  • Preheat your oven to 325 F and line a square 8 x 8 baking pan with parchment.

  • Combine the brown sugar and butter in your stand mixer, and mix until light and fluffy.

  • Add egg and vanilla, and continue mixing until the mixture lightens further.

  • Add flour, baking soda, corn starch, and salt, and mix thoroughly. Then mix for another 2-3 minutes. It’s important to get a good mix so ensure a nice, chewy blondie.

  • To your batter, add white chocolate, sprinkles, and Oreos. Give them a good mix to combine and then pop into your lined baking pan.

  • Smooth out with an off-set spatula and bake for 25 minutes. If they need more time, add another 5 minutes.

  • Let them cool, top with vanilla bean buttercream, confetti cake chunks, and white chocolate ganache.

  • Set in freezer for 30 minutes. Remove from pan and cut into squares

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