If you’re craving a sweet, crunchy treat that comes together without turning on the oven, this Cornflake Peanut Butter Cookies (No Bake) Recipe is going to be your new best friend. Imagine the perfect harmony of peanut butter richness and crispy cornflakes, all held together by a glossy, sweet syrup that sets into irresistible little clusters. These cookies not only satisfy your snack attack swiftly, but they also bring a nostalgic twist reminiscent of classic childhood treats, making them a joyous addition to any gathering or simply a quick homemade indulgence.

Ingredients You’ll Need
The beauty of this Cornflake Peanut Butter Cookies (No Bake) Recipe lies in its simplicity. Each ingredient plays a key role, from the crunchy cornflakes providing texture to the creamy peanut butter creating that heavenly flavor base. Together, they form a cookie that’s both comforting and exciting.
- Granulated sugar: Adds the perfect sweetness to balance the salty peanut butter.
- Light corn syrup: Acts as the binding agent with a subtle sweetness; mini marshmallows can work as a fun substitute.
- Unsalted butter: Optional but adds richness and a slight smoothness to the mix.
- Creamy peanut butter: The star ingredient, giving the cookies their distinctive, nutty flavor and creamy texture.
- Vanilla extract: Enhances the overall flavor with warm, aromatic notes.
- Salt: Just a pinch to balance the sweetness and deepen the flavors.
- Cornflake cereal: Provides that beloved crunch and lightness that make these cookies so special.
How to Make Cornflake Peanut Butter Cookies (No Bake) Recipe
Step 1: Prepare the Baking Sheet
Start by lining a baking sheet with parchment paper to ensure your cookies won’t stick once they’re set. This little step saves time and frustration later, making cleanup a breeze.
Step 2: Melt and Mix the Wet Ingredients
In a medium saucepan over low to medium heat, combine the granulated sugar, light corn syrup, optional butter, and creamy peanut butter. Stir continuously with a spatula until the mixture begins to boil. Once boiling, immediately remove the saucepan from the heat and stir in the vanilla extract and salt. This warm, sticky mixture is the glue that will hold your cookies together.
Step 3: Incorporate the Cornflakes
Gently fold the cornflake cereal into the peanut butter mixture. Take care not to crush the flakes because their light, crisp texture is what makes these cookies so delightful. Make sure every single flake is coated with the delicious syrup for consistent flavor in every bite.
Step 4: Shape the Cookies
Spray a small cookie scoop with non-stick spray and use it to portion the mixture onto your prepared baking sheet. If you like, gently press each mound down to create a classic cookie shape. This step is where your vision for the cookie’s size and shape comes to life.
Step 5: Set the Cookies
Let your cookies rest at room temperature for about 30 minutes. During this time, the sweet syrup will cool and harden, transforming your mixture into perfectly firm, crunchy cookies that hold together beautifully.
How to Serve Cornflake Peanut Butter Cookies (No Bake) Recipe

Garnishes
While these cookies are fantastic on their own, a sprinkle of flaky sea salt or a drizzle of melted dark chocolate can elevate the flavor to a whole new level. These simple garnishes add a touch of elegance and extra bursts of taste that make every bite memorable.
Side Dishes
Pair these no-bake delights with a cold glass of milk for that classic combo, or serve alongside a scoop of vanilla ice cream for a refreshing contrast. Their crunchy texture and peanut butter richness also complement fresh fruit nicely, creating a well-rounded snack or dessert platter.
Creative Ways to Present
For parties, arrange these cookies on a tiered dessert stand to wow your guests visually. You can also sandwich two cookies together with a spread of marshmallow fluff or more peanut butter for a playful twist. Wrapping them individually in parchment tied with a ribbon makes for a charming homemade gift.
Make Ahead and Storage
Storing Leftovers
These Cornflake Peanut Butter Cookies (No Bake) Recipe treats store beautifully in an airtight container at room temperature. Keep them away from humidity and heat to maintain their crunch and freshness for up to a week.
Freezing
If you want to enjoy these cookies later, they freeze well. Place them on a baking sheet to freeze individually first, then transfer to a sealed freezer bag. When frozen properly, they can last up to three months, offering a handy sweet fix whenever the craving strikes.
Reheating
Since these cookies are no bake, reheating isn’t necessary or recommended as it can soften their crisp texture. Instead, simply let them sit at room temperature if they’ve been frozen before enjoying their perfect crunch once more.
FAQs
Can I substitute crunchy peanut butter for creamy?
Absolutely! Using crunchy peanut butter will add even more texture to the cookies, but be mindful it may shift the balance slightly since the cereal already provides crunch. It’s a tasty twist worth trying!
What if I don’t have light corn syrup?
You can substitute the corn syrup with mini marshmallows as the recipe suggests, or try honey or golden syrup. Just keep in mind that the consistency and sweetness might vary a bit, so make sure to monitor the mixture closely while melting.
Can these cookies be made gluten-free?
Yes, as long as you use gluten-free cornflakes, this recipe is naturally gluten-free. Always double-check your ingredient labels to keep it safe for those with gluten sensitivities.
Why do the cookies need to set for 30 minutes?
This resting time allows the syrupy mixture to cool and solidify, which binds the cornflakes together into a firm cookie. Skipping this step could result in cookies that fall apart or are too sticky to handle.
Are these cookies kid-friendly?
Definitely! Their sweet, peanut-buttery flavor and fun crunchy texture make them a big hit with kids. Plus, since they require no oven time, it’s a safe and easy recipe for little helpers to join in on making.
Final Thoughts
This Cornflake Peanut Butter Cookies (No Bake) Recipe is a wonderful example of how simple ingredients and easy steps can result in an incredibly satisfying treat. Whether you’re baking with kids, looking for a quick snack, or craving something sweet without the heat of the oven, these cookies have got you covered. Give them a try—you might just find your new favorite no-bake indulgence!
Print
Cornflake Peanut Butter Cookies (No Bake) Recipe
- Prep Time: 10 minutes
- Cook Time: 5 minutes
- Total Time: 45 minutes
- Yield: 18 cookies
- Category: Dessert
- Method: No-Cook
- Cuisine: American
- Diet: Vegetarian
Description
These Cornflake Peanut Butter Cookies are a delightful no-bake treat combining crunchy cornflake cereal with a sweet peanut butter and sugar syrup mixture. Easy to make and perfect for when you want a quick and tasty snack without turning on the oven.
Ingredients
Wet Ingredients
- ½ cup (100g) granulated sugar
- ½ cup (160g) light corn syrup (or substitute with ½ cup mini marshmallows)
- 2 tablespoons unsalted butter (optional)
- ½ cup (120g) creamy peanut butter
- 1 teaspoon vanilla extract
- ¼ teaspoon salt
Dry Ingredients
- 3 cups (85g) cornflake cereal
Instructions
- Prepare the Baking Sheet: Line a baking sheet with parchment paper to prevent the cookies from sticking and ensure easy cleanup.
- Melt and Mix the Wet Ingredients: In a medium saucepan over low-medium heat, combine the granulated sugar, light corn syrup, unsalted butter, and creamy peanut butter. Stir continuously with a spatula until the mixture begins to boil. Once boiling, immediately remove the saucepan from the heat and quickly stir in the vanilla extract and salt to enhance the flavor.
- Incorporate the Cornflakes: Gently fold the cornflake cereal into the hot peanut butter mixture, taking care not to crush the cereal. Make sure all the cornflakes are evenly coated with the sticky mixture to ensure the cookies hold together well.
- Shape the Cookies: Lightly spray a small cookie scoop with non-stick spray and use it to portion out the cookie mixture onto the prepared baking sheet. If you prefer, gently flatten each cookie to your desired thickness, ensuring even shapes.
- Set the Cookies: Allow the cookies to set at room temperature for approximately 30 minutes or until they become firm to the touch.
Notes
- Light corn syrup can be substituted with mini marshmallows to provide the sticky texture required.
- Butter is optional but adds richness and helps in binding the cookies.
- Be gentle when folding in the cornflakes to keep the cookies light and crunchy.
- Store cookies in an airtight container at room temperature for up to a week.
- These cookies do not require baking, making them quick and easy to prepare.

