Fruity Pebbles Marshmallow Treats

An icon representing a clock 15 min | easy
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Introduction

These Fruity Pebbles marshmallow treats are bright, chewy, and buttery, with that nostalgic cereal flavor kids and adults love.

They come together in minutes, so they are perfect for last-minute bake sales, birthday parties, or lazy weekend snacks.

A touch of vanilla and sea salt keeps them from being too sweet and gives each colorful square a bakery-style finish.

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Ingredients  (16 servings)

Ingredients:

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Overhead view of a white rectangular baking dish filled with Fruity Pebbles marshmallow treat mixture—bright multicolored cereal pieces bound in glossy melted marshmallow—set on a light wood surface with a wooden spoon alongside.

How to Make Fruity Pebbles Marshmallow Treats

  1. Prepare the pan

    Lightly coat a 9x13 inch baking pan with nonstick spray or butter, then set it aside.

  2. Melt the butter

    Add the butter to a large pot and melt it over low heat, stirring often, until completely smooth.

    Keep the heat low to prevent browning, which can make the treats taste a little toasty and less fruity.

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  3. Melt the marshmallows

    Add the mini marshmallows, salt, and vanilla to the pot and stir until the mixture starts to melt.

    Continue stirring over low heat until almost completely smooth, leaving just a few small marshmallow bits for extra gooey pockets.

  4. Combine with cereal

    Place the Fruity Pebbles in a large mixing bowl, then pour the warm marshmallow mixture over the cereal.

    Use a greased spatula to gently fold until the cereal is evenly coated, working quickly before the mixture firms up.

  5. Press into the pan

    Transfer the mixture into the prepared pan and lightly press it into an even layer with the greased spatula.

    Do not pack it down too firmly, or the bars will set very dense and lose their soft, chewy texture.

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  6. Cool and slice

    Let the pan sit at room temperature until the treats are completely cool and firm, about 30 to 45 minutes.

    Cut into squares or rectangles and serve, wiping the knife between cuts for cleaner looking edges.

Fruity Pebbles marshmallow treats cut into colorful square bars and arranged on a wire cooling rack; a bowl of cereal and a folded blue cloth sit blurred in the background on a white wooden table.

Substitutions

Fruity Pebbles -> Any colorful fruity cereal
Swap the Fruity Pebbles with Trix, Froot Loops, or a similar fruity cereal for a slightly different crunch and flavor.
Butter -> Salted butter
Use salted butter and skip the added salt for a slightly more savory balance against the very sweet cereal.
Butter -> Coconut oil
Replace the butter with refined coconut oil for a dairy-free option that still sets nicely and tastes lightly tropical.
Three thick Fruity Pebbles marshmallow treat squares stacked on a white plate, with colorful cereal pieces visible throughout and scattered on a rustic white wooden surface; soft gray background.

Tips

Use fresh marshmallows
Older marshmallows dry out and resist melting, which makes the treats tougher and less gooey.
Grease everything that touches the mixture
Lightly coat your spatula, mixing bowl, and even your hands to keep the sticky mixture from clumping and tearing.
Adjust pan size for thickness
For extra thick bars, use an 8x8 inch pan; for thinner party bites, use a half sheet pan.
Mix gently to protect the cereal
Stir with a folding motion instead of vigorous stirring, which helps keep the cereal from breaking into powdery crumbs.
Line the pan for easy lifting
Add a parchment sling with overhang before greasing so you can lift the whole slab out cleanly for cutting.
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Nutrition Facts *

Energy 158 kcal
Protein 1 g
Total Fat 4 g
Carbohydrates 29 g
Dietary Fiber 0 g

* Approximate, per serving.
Data source: USDA FoodData Central.

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FAQ

Why did my Fruity Pebbles treats turn out hard instead of soft and chewy?
They likely cooked too long or over higher heat, which overcooks the sugar in the marshmallows. Use low heat, stir constantly, and remove the pot as soon as the marshmallows are almost fully melted. Also avoid pressing the mixture too firmly into the pan.
Can I make these treats in the microwave instead of on the stove?
Yes, melt the butter and marshmallows together in a large microwave-safe bowl in 30 second bursts. Stir between each burst until smooth, then quickly mix in the cereal and press into the prepared pan.
How should I store Fruity Pebbles marshmallow treats, and how long do they stay fresh?
Store the cooled bars in an airtight container at room temperature, with parchment between layers to prevent sticking. They taste best within two days, but usually stay pleasant and chewy for up to three days.
Can I use regular size marshmallows instead of mini marshmallows?
Yes, regular marshmallows work, but they take longer to melt and may need more stirring for a smooth mixture. Measure by weight if possible, aiming for about 10 ounces total marshmallows.
Can I add extra mix-ins like candy or white chocolate?
You can fold in up to one cup of extras, like mini white chocolate chips or sprinkles, after coating the cereal. Avoid very heavy or large pieces, which sink and make slicing difficult.
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Serving Suggestions

These playful, colorful bars make a fun dessert for kids, birthday parties, bake sales, or easy weeknight treats.

Try drizzling the cooled slab with melted white chocolate or adding rainbow sprinkles on top for an extra festive finish.

More pairings:

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Reviews

  • Henry, Charlotte: These turned out perfectly soft and gooey with that bright fruity flavor 😋 Keeping the heat low was key, and leaving a few little marshmallow bits made the best pockets. I also took your advice and pressed super lightly so they stayed nice and chewy. Will definitely make again for parties! — 5 ★

    Eunice: Happy they came out soft and gooey for you, Henry! Keeping the heat low and pressing lightly really does keep them chewy, and those little marshmallow pockets are the best. 😊

  • Annette: These turned out perfectly soft and super gooey, and the vanilla and pinch of salt really made the fruity flavor pop! — 5 ★

    Eunice: So happy they came out soft and gooey for you, Annette! The vanilla and that little pinch of salt really do make the Fruity Pebbles flavor pop. 😊

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