Frosted Funfetti Blondies

Prep Time 15 minutes
Total Time 35 minutes
Servings 18

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This recipe for Frosted Funfetti Blondies is a KEEPER! They are dense and fudgy and loaded with sprinkles, then topped with a creamy buttercream frosting — perfect for birthdays or parties!

tall stack of frosted funfetti blondies with lots of sprinkles on white background

Because in this house of girls, we can never get enough sprinkles!

These bars are chewy, full of vanilla flavor and topped with a simple frosting.

one square of funfetti blondies up close with more in the background and sprinkles all around

I love baking cookies and bars because they are just as good the next day, or the next week, or the next month out of the freezer. They last better than any other baking, the texture doesn’t change, and you can make a huge batch and save for later, easily grabbing one or two at a time (or, if you’re me, 4 or 5).

white plate with stack of 3 funfetti blondies with frosting and sprinkles

So when I was set to post my first recipe (these Funfetti Frosted Blondies!) on September 24, I knew there were going to be sprinkles. It was, after all, my birthday! I am getting ever so close to that 3-0 mark and I’m going to need all the sprinkles and frosting to console myself.

I’m actually not mad about it though. When I look at what has happened in the last 10 years, I think it’s pretty amazing, and I definitely don’t want to be where I was 10 years ago (except I would maybe consider returning to my pre-baby body!), so I’m okay with aging. I mean, at least for now πŸ˜‰


  • Because they are so freezer-friendly, I made a big batch in a 9×13″ pan. They are perfect for saving for unexpected guests or quick treats for school lunches!
  • I love storing them up in these giant Rubbermaid containers — they stack up well in the freezer and are easy to get at!
  • You can mix up the colors of sprinkles to suit any occasion — CHristmas, birthdays, sports events — whatever you like!

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Frosted Funfetti Blondies

4.25 from 4 votes
This recipe for Frosted Funfetti Blondies is a KEEPER! They are dense and fudgy and loaded with sprinkles, then topped with a creamy buttercream frosting — perfect for birthdays or parties!
Prep Time 15 minutes
Cook Time 20 minutes
Total Time 35 minutes
Cuisine American
Course Dessert
Servings 18
Calories 356cal


  • 1 cup butter 2 sticks, melted
  • 2 cups brown sugar packed
  • 2 large eggs
  • 2 teaspoons vanilla extract
  • 1/2 teaspoon salt
  • 2 cups all purpose flour
  • 1/4 cup large sprinkles


  • 1/4 cup butter softened
  • 3 cups powdered icing sugar
  • 2 teaspoons vanilla
  • 2-3 tablespoons milk
  • 1 tablespoon sprinkles


  • Preheat oven to 350 degrees F. Line a 9×13″ pan with tin foil and spray with non stick spray.
  • In a large bowl, combine melted butter and brown sugar and whisk until smooth. Add egg and whisk until combined. Add vanilla, salt, and flour and stir just until combined. Stir in sprinkles.
  • Spread into prepared pan and bake for 20-22 minutes, until a toothpick comes out clean in the center. Set aside to cool to room temperature.
  • FrostingIn a medium bowl, beat butter with an electric mixer until smooth. Add sugar, vanilla and 2 tablespoons milk and beat until smooth. If desired, add a little more milk or sugar to reach desired consistency. Stir in sprinkles and spread over cooled bars.

Nutrition Information

Calories: 356cal | Carbohydrates: 57g | Protein: 2g | Fat: 13g | Saturated Fat: 8g | Cholesterol: 52mg | Sodium: 192mg | Potassium: 59mg | Sugar: 46g | Vitamin A: 420IU | Calcium: 31mg | Iron: 0.9mg

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Meet Ashley

My name is Ashley Fehr and I love creating easy meals my family loves. I also like to do things my way, which means improvising and breaking the rules when necessary. Here you will find creative twists on old favorites and some of my favorite family recipes, passed down from generations!

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Reader Interactions


  1. Cierra says

    The flavor is delicious! They’re still cooling but they look like I added too much butter and I followed the recipe fully. Hoping they harden up when they cool!

  2. Jessica says

    Looks great, smells great but definitely not the wrong times. I’m an avid baker and frequently check the temp of my oven. 350 for 20-22 minutes is not enough. Closer to 30/35 minutes.

    • The Recipe Rebel says

      I’m sorry to hear that you had trouble with the recipe, Jessica. The timing and method has worked well for myself (and others) so I wished it would of been a hit for you too!

  3. Marci says

    I made these and they turned out runny and raw inside… so they need to chill overnight? I followed the recipe to a T? Cooked for s total of 25 min. I’m not at high altitude either πŸ™ keeping it in the fridge overnight and hoping they set tomorrow

    • Ashley Fehr says

      Hi Marci! Blondies should definitely not be runny and raw inside — I think the oven temperature might be off somewhat, but you should definitely bake until they are set.

  4. Kelly says

    Congrats, Ashley! Such a perfect fit, you are the bars queen! These are so so pretty and the sprinkles make them so perfect for celebrating a birthday or any special occasion!

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