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A recipe for Fruity Pebbles Rice Krispie treats, made with marshmallows, butter, and colorful Fruity Pebbles cereal. This rainbow twist on traditional Rice Krispie treats makes a fun addition to bake sales, birthday parties, and Pride Month celebrations.
Why Make These Fruity Pebbles Rice Krispie Treats?
Although I’m proud of my training and enjoy making fancy French pastries as much as the next pastry chef, I’m also a sucker for the childhood classics: oatmeal cream pies, M&M cookies, gummy bears, and lollipops. I also love Rice Krispie treats. In the past, I’ve developed all kinds of fun cereal treat recipes, like Nutella Rice Krispie treats and treats shaped like shamrocks, pumpkins, and miniature birds’ nests.
Every June, I find myself leaning into color—in my wardrobe, my IG account, and definitely in my kitchen. Anyone who knows me knows I love a rainbow recipe, and with Pride celebrations just around the corner, it seemed like a good time to add a new one to the mix.
This time last year I shared a recipe for striped rainbow rice krispie treats. This year, I decided to build my recipe around a rainbow-colored cereal. The result? These sweet, fruit-flavored treats made with Fruity Pebbles (talk about a childhood classic!!)
Featuring a rainbow-hued twist on the marshmallow-and-butter combo we all loved as kids, these cereal treats are sweet, crunchy, unapologetically colorful, and just in time for Pride.
Fruity Pebble Rice Krispie Treats Recipe Ingredients
To make these Fruity Pebbles Rice Krispie treats, start by gathering the following ingredients:
- Unsalted Butter – You’ll need 90 grams (6 tablespoons) of unsalted butter. No need to soften—it’ll be melted anyway!
- Marshmallows – You can make these treats with jumbo, large, or mini marshmallows. Use a scale to weigh out 300 grams, or about 10 1/2 ounces.

- Vanilla Extract – I prefer a good-quality vanilla extract from a brand such as Nielsen-Massey or Taylor & Colledge.
- Fine Sea Salt – A small amount of fine sea salt (or table salt) cuts the sweetness of the marshmallows and cereal.
- Fruity Pebbles – Fruity Pebbles are an American product, manufactured by Post. In the UK and elsewhere, you can purchase an imported box from Amazon (or a specialty retailer like Partridges in London) or use a similar brightly colored, fruit flavored cereal.
Tips and Tricks for Making Fruity Pebble Krispie Treats
A few things to keep in mind when making these rainbow cereal treats:
Don’t press too hard. When pressing the Fruity Pebbles mixture into the tin, press down gently with damp or oiled fingertips. Don’t press too firmly—packing the cereal into the tin will make the bars difficult to slice, and even more difficult to bite.
Prepare the tin. Do not skip the parchment preparation step. Lining the square tin with a criss-cross of parchment (and allowing an overhang on all sides) prevents the treats from sticking to the metal and creates a “sling” that makes it super easy to transfer the slab to a cutting board in one piece.
Use a sharp knife. A sharp, well-oiled chef’s knife makes slicing a breeze.
Make-Ahead and Storage Suggestions
These Fruity Pebble Rice Krispie treats taste best on the day they’re made. Layer leftover treats between sheets of parchment or wax paper and store in an airtight container at room temperature for up to 3 days.
Other krispie treat recipes you might enjoy:
Nutella Rice Krispie Treats
Rainbow Rocky Road Slice
Rainbow Rice Krispie Treats
Pumpkin Rice Krispie Treats
Peanut Butter Rocky Road Slice
And if you do make these, or any of my recipes, don’t forget to tag me @bastecutfold or use the hashtag #bastecutfold on Instagram. I always love to see what you’re making!
Fruity Pebbles Rice Krispie Treats
A recipe for Fruity Pebbles Rice Krispie treats, made with marshmallows, butter, and colorful Fruity Pebbles cereal.
- Prep Time: 10 minutes
- Cooling Time: 1 hour
- Cook Time: 1 hour 10 minutes
- Total Time: 2 hours 20 minutes
- Yield: 16 treats
- Category: Krispie Treats
- Method: Stovetop
Ingredients
90 grams unsalted butter (6 tablespoons)
300 grams marshmallows (about 10 1/2 ounces)
1 teaspoon vanilla extract
1/8 teaspoon fine sea salt
90 grams Fruity Pebbles cereal (about 5 cups)
Instructions
Line an 8 x 8-inch square tin with parchment, and spray generously with nonstick spray.
Add the butter to a large, heavy-bottomed saucepan or stock pot. Melt the butter.
Add the marshmallows, stirring continually until completely melted.
Remove from heat. Stir in vanilla extract and fine sea salt.
Add the cereal and stir until fully combined, with no dry cereal remaining.
Pour cereal mixture onto prepared tin.
With damp fingertips, pat down gently until evenly distributed. (Do not press too firmly, or the treats will be difficult to chew!)
Set aside. Cool at room temperature, at least 1 hour.
Lifting by the parchment overhang, transfer cooled slab to a cutting board.
With a sharp, well-oiled chef’s knife, slice into squares.
Serve immediately.
Arrange leftover treats in an airtight container, layered between sheets of parchment. Store at room temperature for up to 3 days.