Get ready to taste pure nostalgia in every bite! These Fruity Pebbles Blondies are a bright, chewy, marshmallow-packed treat that brings your favorite childhood cereal straight into dessert territory!

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What makes this recipe irresistible
With golden edges, a soft, buttery center, pops of crunchy cereal, and a dreamy white chocolate drizzle on top, these bars are everything you didn't know you needed.
Whether you're baking for kids, a colorful party, or just craving a playful twist on classic blondies, this recipe is guaranteed to add a little rainbow magic to your day!

Ingredients
Please refer to the printable recipe card below for the exact measurements for this recipe.

Fruity Pebbles Blondies
Equipment
- 1 8x8 baking dish
Ingredients
- ½ cup butter
- ½ cup granulated sugar
- ½ cup brown sugar
- 2 eggs room temperature
- 1 teaspoon pure vanilla extract
- 1 â…“ cups all-purpose flour
- ¼ teaspoon salt
- 2 cups Fruity Pebbles Cereal
- ½ cup white chocolate chips
- ½ cup mini marshmallows
- â…“ cup white chocolate melted
Instructions
- Preheat the oven to 350 degrees. Line an 8x8-inch baking pan with parchment paper, leaving a slight overhang for easy removal. Lightly grease the parchment.
- Melt the butter in a microwave-safe bowl or saucepan until just melted. Let it cool slightly.
- In a large mixing bowl, whisk together the melted butter, granulated sugar, brown sugar and vanilla extract until smooth and combined.
- Add the eggs one at a time, mixing well after each addition.
- Fold in the flour and salt until just combined. Avoid overmixing to keep the blondies soft.
- Gently fold in the Fruity Pebbles cereal, white chocolate chips, and mini marshmallows until evenly distributed throughout the batter.
- Spread the batter evenly into the prepared baking pan. Use a spatula to smooth the top.
- Bake for 25-30 minutes, or until the edges are golden and a toothpick inserted near the center comes out with just a few moist crumbs.
- Allow the blondies to cool completely in the pan. Once cool, lift them out using the parchment paper.
- Drizzle the melted white chocolate over the top. Let it set before slicing into squares.
Notes
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Nutrition

Frequently asked questions (FAQ's)
Absolutely! For a crowd, double the ingredients and bake in a 9x13-inch pan. You may need to increase the bake time by 5-10 minutes - keep an eye on the center for doneness.
They soften slightly in the batter but retain a bit of texture, especially on top. If you love extra crunch, you can sprinkle a few on top of the batter before baking or press them into the melted white chocolate drizzle once cooled.
Yes! Try using Cocoa Pebbles, Cap'n Crunch, or Lucky Charms for fun variations - just keep the measurements the same.
You can, but it adds a creamy sweetness and helps balance the tart crunch of the cereal. You can also use colored candy melts for a festive twist.
Deb's top tips
Toast the cereal (optional): For a boost of nutty, caramel-like flavor and extra crunch, toast the Fruity Pebbles on a baking sheet at 300°F for 5-7 minutes before mixing them into the batter. Let them cool first!

Related recipes
If these fruity bars made you smile, you'll want to check out a few more of our sweet, snackable favorites! My Peanut Butter Cheerio Bars are a no-bake classic with peanut butter and marshmallows. Super easy and kid-approved!
Craving chocolate? Don't miss the Banana Chocolate Bars, soft and rich with just the right touch of sweetness. And if you're feeling a little fancy, my Cake Mix Carrot Cake Blondies bring all the cozy spice and cream cheese goodness in a handheld bite!
Wrapping it up
And there you have it-bright, buttery, marshmallow-studded bars that are basically a cereal lover's dream come true. These Fruity Pebbles Blondies bring the joy of Saturday morning cartoons straight to your dessert plate.
If you give this recipe a try, pop into the comments and tell me how fast they disappeared from your kitchen counter. Bonus points if you manage to sneak one before the kids find out! 😋
Lois Corliss says
This looks like a wonderful snack or a great after dinner treat. Thank you. Should be a real kid pleaser.