If you’re looking for a fun, crunchy, and utterly irresistible treat to whip up in no time, the Cornflake Marshmallow Treats Recipe is an absolute winner. With its perfect balance of buttery toasted cornflakes and gooey, melted marshmallows, these treats offer a delightful texture that just melts in your mouth. Whether you’re serving them as a nostalgic snack or a crowd-pleasing dessert, this recipe is both simple and comforting, embracing that classic cozy vibe everyone loves.

A black pot filled with a pile of white marshmallows stacked unevenly, some marshmallows softened and starting to melt in bubbling butter at the bottom. The pot is placed on a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

Ingredients You'll Need

This recipe shines because of its simplicity—each ingredient plays an essential role in creating the perfect texture and flavor. From buttery goodness to the satisfying crunch of cornflakes, here’s everything you’ll need to make magic happen in your kitchen.

7 cups crushed cornflakes: Slightly crushed for that ideal crispy yet tender bite that makes these treats so addictive.
8 tablespoons unsalted butter: Browning the butter adds a deep, nutty aroma that elevates the entire flavor profile.
½ teaspoon kosher salt: Just a pinch to balance the sweetness perfectly and bring out rich flavors.
1 (12-ounce) bag marshmallows: The sticky, dreamy binder that melts everything together wonderfully, can be mini or regular-sized.

How to Make Cornflake Marshmallow Treats Recipe

Step 1: Toast the Cornflakes (Optional but Recommended)

Start by preheating your oven to 325°F and lining two baking sheets with parchment paper. Spread the slightly crushed cornflakes evenly across the pans and toast them for about 10 minutes, turning gently with a spatula to ensure an even golden color. This toasting step adds a rich, toasty flavor and extra crunch that takes these treats from good to unforgettable. Once toasted, let them cool for about 5 minutes before moving on.

Step 2: Prepare Your Baking Dish

While your cornflakes cool, grab a 9x9 baking dish and give it a good spray with baking spray. Then, line the bottom with parchment paper. This simple step ensures your treats will come out effortlessly once set.

Step 3: Brown the Butter

In a large pot, melt your unsalted butter over low heat. Keep stirring until the butter turns a lovely light brown color with a nutty scent—about 4 to 6 minutes. This browning step is what gives your Cornflake Marshmallow Treats Recipe its depth and warm, inviting flavor that’s hard to resist.

Step 4: Add Salt and Marshmallows

Sprinkle in the kosher salt and whisk it into the butter. Then add all of your marshmallows to the pot. Using a rubber spatula, gently stir until the marshmallows melt completely, creating a smooth, luscious mixture.

Step 5: Combine Cornflakes and Marshmallow Mixture

Now pour your toasted (or untoasted if you skipped step one) cornflakes into the pot. Stir thoroughly until every piece is coated with that glossy, marshmallow-butter delight. This part is pure magic because you start seeing your treats coming to life.

Step 6: Transfer and Set

Move the sticky mixture into your prepared baking dish. Use a rubber spatula, lightly greased with non-stick spray, to press the mixture evenly and smooth the top. Then, let your delectable Cornflake Marshmallow Treats Recipe cool undisturbed for about 30 minutes. Once set, slice into squares and get ready to enjoy!

How to Serve Cornflake Marshmallow Treats Recipe

A close-up of a black cooking pot filled with a bright orange mixture of crushed cereal flakes and melted cheese. The pot is placed on a white marbled surface. The layers include a thick base of melted cheese that is sticky and shiny in the middle, surrounded and topped by crunchy cereal flakes that cover the entire surface and edges. A black cooking spoon is partially buried in the mixture on the left side, showing some flakes stuck along its edge. The overall look is rough and crumbly with a warm, golden-orange color. photo taken with an iphone --ar 4:5 --v 7

Garnishes

These treats are fantastic on their own, but you can sprinkle a few mini chocolate chips, colorful sprinkles, or even a drizzle of melted chocolate on top for a festive touch. A light dusting of powdered sugar also adds a pretty finish and a hint of extra sweetness.

Side Dishes

Pair these chewy, crispy bars with a cold glass of milk or a warm cup of hot cocoa for the ultimate cozy snack experience. For a grown-up twist, serve alongside a simple vanilla or caramel-flavored coffee.

Creative Ways to Present

If you want to impress guests, cut your bars into bite-sized squares and arrange them on a wooden board with fresh fruit and nuts for a charming dessert spread. You can also use cookie cutters to create fun shapes for parties or holidays, adding a playful and festive vibe.

Make Ahead and Storage

Storing Leftovers

Your Cornflake Marshmallow Treats Recipe stays fresh for up to a week when stored in an airtight container at room temperature. Keep them away from heat or humidity to maintain that addictive crispness and marshmallow chew.

Freezing

If you want to make these ahead of time and enjoy them later, they freeze beautifully. Wrap individual squares or the whole pan tightly in plastic wrap and place in a freezer-safe container. When you’re ready, just thaw at room temperature for about an hour.

Reheating

While these treats are best enjoyed fresh or slightly warmed, you can briefly microwave leftovers for about 10 seconds to soften the marshmallows if they’ve hardened a bit. This step brings back some of their original gooey charm.

FAQs

Can I use regular crispy cornflakes or do they have to be crushed?

Either works, but crushing the cornflakes slightly gives you that perfect balance of crispy texture without overpowering the marshmallow coating. It’s what makes this Cornflake Marshmallow Treats Recipe so delightful.

Is it necessary to brown the butter?

Not absolutely! Browning the butter adds a lovely nutty flavor that deepens the richness of these treats, making them extra special. However, if you’re in a hurry, melted butter works as well.

Can I use flavored marshmallows?

Definitely! Using flavored marshmallows like vanilla, strawberry, or even chocolate can add a fun twist, customizing your Cornflake Marshmallow Treats Recipe to match any occasion.

Are these treats gluten-free?

Yes, cornflakes are naturally gluten-free, but always double-check the packaging to ensure there are no gluten-containing additives. This recipe is a great gluten-free dessert option.

How do I prevent the marshmallow mixture from sticking to my spatula?

Spraying your rubber spatula with non-stick spray before stirring and pressing the mixture helps tremendously. This little trick makes handling the sticky marshmallow mixture much easier.

Final Thoughts

This Cornflake Marshmallow Treats Recipe is more than just a snack—it’s a delightful blend of textures and flavors that brings joy with every bite. Whether you’re making it for an afternoon pick-me-up, a party favor, or just because, it’s sure to become one of your favorite go-to treats. Give it a try and watch smiles light up around your kitchen!

Cornflake Marshmallow Treats Recipe

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4.2 from 75 reviews

Author: Sky
Total Time: 35 minutes
Yield: Makes 9 large or 12 small squares
Diet: Gluten Free, Vegetarian

Print Recipe

Description

Delightfully crispy and sweet, these Cornflake Marshmallow Treats combine toasted cornflakes with buttery, melted marshmallows for a nostalgic and satisfying snack. Perfectly toasted cornflakes add a nutty crunch balanced by the gooey marshmallow mixture, making them an irresistible treat for both kids and adults.

Ingredients

Dry Ingredients

7 cups cornflakes, crushed slightly to the size of Rice Krispies
½ teaspoon kosher salt
1 (12-ounce) bag marshmallows, any size

Wet Ingredients

8 tablespoons unsalted butter

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Instructions

Optional: Toast Cornflakes. Preheat your oven to 325°F (163°C) and line two baking sheets with parchment paper. Spread the crushed cornflakes evenly between the sheets. Toast in the oven, stirring and turning the cornflakes with a spatula frequently, until they are evenly browned, about 10 minutes. Remove and allow to cool on the pans for 5 minutes, then transfer to a large bowl.
Prepare Baking Dish. Spray a 9x9 inch baking dish with non-stick cooking spray and line the bottom with parchment paper. Set aside.
Melt Butter. In a large pot over low heat, melt the unsalted butter slowly. Continue cooking until the butter turns a light brown color and releases a fragrant, nutty aroma, about 4 to 6 minutes. This browning adds depth of flavor to your treats.
Add Salt and Marshmallows. Stir in the kosher salt, then add the marshmallows. Use a rubber spatula to stir constantly until the marshmallows have completely melted and the mixture is smooth and glossy.
Combine with Cornflakes. Immediately add the toasted cornflakes to the marshmallow mixture. Stir well to evenly coat all the cereal pieces with the sticky marshmallow mixture.
Transfer to Baking Dish. Pour the mixture into the prepared baking dish. Using a rubber spatula lightly greased with non-stick spray, press and smooth the mixture evenly to create an even thickness.
Cool and Serve. Allow the treats to cool and set at room temperature for approximately 30 minutes. Once firm, lift the parchment out of the dish, cut into 9 large or 12 small squares, and serve.

Notes

Toasting the cornflakes is optional but highly recommended for enhanced flavor and crunch.
Ensure butter is browned carefully on low heat to avoid burning and bitterness.
Use a rubber spatula greased with non-stick spray to prevent sticking when pressing the mixture into the pan.
These treats contain milk allergens due to butter and marshmallows.
Store leftovers in an airtight container at room temperature for up to 3 days for best freshness.

Prep Time: 20 minutes
Cook Time: 15 minutes
Category: Dessert
Method: Stovetop
Cuisine: American