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brown butter funfetti blondie bars

these easy to make brown butter blondie bars get a festive addtion of sprinkles baked inside. they are then topped with an easy vanilla buttercream and eveb more sprinkles, making them perfect for celebrating birthdays and every day.
5 from 1 vote
Prep Time 45 mins
Cook Time 25 mins
Cooling Time 30 mins
Course Celebrations, Dessert
Cuisine American


  • stand mixer with paddle attachment or hand mixer
  • 8x8 baking pan
  • parchment paper


brown butter funfetti blondie bars

  • 1 1/2 c GF flour (222g) sub with 1 3/4 c all purpose
  • 1/2 tsp baking powder
  • 1/4 tsp baking soda
  • 1/4 tsp salt
  • 1/2 c brown butter (113g) 10 tbsp browned, reduced to 8tbsp or 1/2c)
  • 1/2 c light brown sugar (110g)
  • 1/2 c granulated sugar (110g)
  • 2 large eggs, room temperature
  • 1 tsp vanilla extract
  • 1/3 c sprinkles

classic vanilla buttercream frosting

  • 1/4 c unsalted butter, softened
  • 2 c powdered sugar, sifted (235g)
  • 2-3 tbsp milk, as needed
  • 1/2 tsp vanilla extract
  • 1-2 tbsp sprikles for topping


brown butter funfetti blondies

  • To make the brown butter, melt butter in a clear heavy bottom pot. Once the butter starts to foam, whisk continuously until brown bits start to form. Remove from heat, pour into clean bowl, skim the foam from the top and cool to room temperature (25-30 minutes).
  • Line 8X8 baking pan with parchment paper and preheat oven to 350F. Whisk together flour, baking powder, baking soda and salt. Set aside.
  • In a stand mixer with paddle attachment, beat browned butter and sugar until smooth and well combined, about 3 minutes. Add eggs one at a time beating well after each one. Add vanilla extract, beating until well combined. 
  • Add dry ingredients to the wet 1/2 batch at a time. By hand, mix each time until JUST combined. A few flour streaks is okay! Fold in sprinkles. Drop evenly sized scoops into the prepared pan. Evenly press batter/dough into the pan.
  • Bake at 350 for 25- 28 minutes. A toothpick inserted into the center should come out with a few moist crumbs. The edges will pull slightly from the pan. Cool in pan on a cooling rack for 30 minutes. Remove from the pan and cool an additional time as needed to room temperature before frosting.

classic vanilla buttercream frosting

  • In a stand mixer, with paddle attachment, place butter, 2 cups powdered sugar, vanilla extract and 2 tbsp milk. Beat until smooth and creamy. If needed, add 1-2 more tbsp milk. Once smooth and creamy, add 1/2 c powdered sugar at a time. Beat on high until desired frosting consistency is reached. Frosting should be thick and spreadable.
Keyword birthday bars, blondie bars, funfetti, small batch baking
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