Marshmallow Fluff Rice Krispie Treats

Marshmallow Fluff Krispie Treats are packed with the maximum amount of marshmallow — both mini marshmallows and Marshmallow Fluff — to create the gooiest, softest krispie treat you’ll ever taste. This homemade rice krispie treat recipe also includes Fruity Pebbles for a colorful, crunchy twist.

Marshmallow Fluff Krispies, stacked

The Best Rice Krispie Cereal Dessert

I once shared what I called the “Perfect Krispie Treat.” Over time, though, I kept experimenting because I wondered if it could be improved. That curiosity led me to these Marshmallow Fluff Krispie Treats. If you love a soft, marshmallow-forward bar with the right structure, you should try this version.

A Homemade Marshmallow Fluff Krispie Treat Recipe

These bars are designed to push marshmallow flavor to the limit without losing the shape and texture you expect from a classic krispie treat. The key is using both melted mini marshmallows and Marshmallow Fluff. The Fluff adds airy volume and exceptional softness, while the melted minis help the bars bind and hold their form.

These krispie treats stay soft for days and develop a slightly better texture after they rest overnight. They’re spongy, slightly gooey, and delightfully tender — a real crowd-pleaser.

Overhead view of a Fluff Krispie Treat being broken apart

Tips and Tricks for Perfect Marshmallow Fluff Krispies

If you add too many melted marshmallows, the bars can become chewy and may not hold their shape. To avoid that, combine melted minis with Marshmallow Fluff. The Fluff contributes loft and a wonderfully soft mouthfeel while keeping the mixture manageable when pressed into the pan.

I like to use a mix of Rice Krispies and Fruity Pebbles — three cups of each — for a balance of classic cereal texture with a burst of color and fruity crunch. However, you can use any cereal combination you prefer, or stick to all Rice Krispies for a traditional flavor.

Fruity pebbles in a bowl for Marshmallow Fluff Krispie Treats

Start by melting the butter and marshmallows on the stovetop, then fold in the cereals and the Fluff. Finish by stirring in the remaining mini marshmallows for extra chew and marshmallow pockets throughout the bars. Press into a lined pan, let the mixture set, and slice into squares.

Overhead view of Krispie Treats with fluff being mixed in a bowl

The Fluff is interchangeable with marshmallow creme; both will give the same light, fluffy quality. Adding extra mini marshmallows after incorporating the Fluff gives the mixture delightful texture contrasts and little pockets of chewiness.

Fluff being added to a bowl of Krispie Treats mixture

Once mixed, press the mixture into a lined and lightly greased pan. These bars need time to set: allow at least an hour, and longer if possible. The Fluff needs a bit of time to firm up so the bars slice cleanly.

Mini marshmallows being added to a bowl of Krispie Treats mixture

After resting, slice the bars into squares. They look beautiful and remain soft and tender for days when stored properly.

Mixture of Krispie Treats made with Fluff and mini marshmallows in a bowl

These are, in my opinion, an elevated version of the classic rice krispie treat — rich with marshmallow flavor and delightfully pillowy. If you already know the classic recipe, try this one next time you want to take your krispies up a notch.

Krispie Treats made with Fluff and mini marshmallows being spread into a foil-lined pan

Description

Marshmallow Fluff Krispie Treats combine melted mini marshmallows and Marshmallow Fluff with Rice Krispies and Fruity Pebbles for an ultra-soft, flavorful bar. The combination produces a tender, spongy texture with great marshmallow flavor and a colorful crunch.

Ingredients

  • 5 tablespoons butter
  • 8 cups mini marshmallows, divided
  • 1/2 teaspoon kosher salt
  • 1 1/2 cups Marshmallow Fluff
  • 3 cups Rice Krispie cereal
  • 3 cups Fruity Pebble cereal

Instructions

  1. Line a 9×9 pan with foil and lightly grease or spray with nonstick spray. Set aside.
  2. In a large saucepan over medium-low heat, melt the butter.
  3. Add 6 cups of the mini marshmallows and the salt to the melted butter, stirring constantly until fully melted. Remove from heat.
  4. Immediately stir in both cereals until they are evenly coated with the melted marshmallows. Stir in the Marshmallow Fluff until incorporated, then fold in the remaining 2 cups of mini marshmallows.
  5. Spread the mixture evenly into the prepared pan and press gently to level.
  6. Allow the bars to set for at least one hour before cutting into squares.

Notes

You can use any combination of cereals, or stick with all Rice Krispies for a traditional result. Store the bars airtight for up to five days; they remain soft and often taste even better on the second day.

Nutrition (approx.)

  • Serving Size: 1 treat
  • Calories: 221
  • Sugar: 28.9 g
  • Sodium: 222.5 mg
  • Fat: 2.4 g
  • Carbohydrates: 49.4 g
  • Protein: 1.3 g
  • Cholesterol: 0.1 mg
Marshmallow Conversion Chart

Enjoy these Marshmallow Fluff Krispie Treats as a playful, indulgent dessert or snack. They’re quick to make, transport well, and are perfect for parties or an easy homemade treat.