These 5-minute No-Bake Peanut Butter Cornflake Cookies are a quick and easy snack to satisfy your sweet tooth on busy days! With just a handful of ingredients and no oven required, this recipe is perfect for those times when you need a delicious treat but don’t have a lot of time to spare. The combination of creamy peanut butter and crunchy cornflakes makes for a satisfying and sweet treat that is sure to please the whole family!
These cookies are easily customizable – add in some chocolate chips or drizzle with melted chocolate for an extra indulgent twist. Whip up a batch of these cookies in no time and enjoy a delicious treat without the fuss. They’re similar to your favorite Rice Krispies treats and just as quick to make.
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I absolutely love a recipe that’s been around for years. You know, the ones like Grandma used to make – Italian Bread, Three Bean Salad, Crockpot Spareribs, her Griddle Cakes (aka BEST Pancakes EVER!! – YUM!), and others.
They are tried and true recipes, the ones that have been around for generations. That’s because people have made them and loved them again and again. They’re a wonderful thing—relics, in a way, and ones we can pass on to future generations.
This recipe for no-bake cookies is just that.
While I’ve never even had a Cornflake Cookie, I knew I had to give this recipe a shot since I’ve seen them around for years.
Only Five Simple Ingredients Needed
Here are the ingredients you will need to make these easy peanut butter cornflake cookies:
- 6 cups of Corn Flakes, of course. They wouldn’t be Cornflake Cookies without this!
- 3 tablespoons Butter – salted or unsalted, but I prefer salted.
- 10 ounces Marshmallows – NO Corn Syrup to boil, folks!! And yes, I know, there usually IS corn syrup in marshmallows. I use miniature marshmallows because they’ll take less time to melt.
- ½ cup creamy Peanut butter –natural peanut butter or chunky peanut butter would work as well.
- ½ teaspoon pure vanilla extract – yes, you can use vanilla extract if you’re not using the pure, but PLEASE don’t use the imitation! It really does make a difference, and you aren’t doing yourself a favor even if you are saving a few pennies.
How to make Peanut Butter Cornflake Cookies
Here’s how to make this no-bake cookie recipe:
- Melt butter in a large pot over medium heat. I highly recommend using a non-stick pot. For years, and I do mean YEARS, I used just a regular pot to make various Rice Krispies treats like this one. FINALLY, I bought a non-stick pot, and it seriously changed my life. No joke.
- After the butter melts, pour in the marshmallows and continue stirring until melted. Add the peanut butter and vanilla and mix until smooth.
- Pour in the cornflake cereal and stir until the peanut butter mixture is well combined.
- Using a tablespoon or a small cookie scoop, place scoops of the mixture onto a cookie sheet lined with parchment paper.
- Allow the cornflake cookies to cool completely to room temperature and harden.
Tips for Making the Perfect No-Bake Peanut Butter Corn Flake Cookies
- When mixing the peanut butter and marshmallows, make sure they are fully combined. This will ensure that the cookies hold together well.
- Be gentle when folding in the cornflakes. You don’t want to crush them, as the texture is important for the final product.
- If the mixture seems too sticky, you can add more cornflakes until it reaches the desired consistency.
- Use a cookie scoop or spoon to shape the cookies for a more uniform look. Spray it with nonstick cooking spray so the cookies will slide out easily!
Variations on no-bake Cornflake Cereal Bars
These easy cornflake cookies are delicious on their own, but if you’re feeling adventurous, here are some variations to try:
Chocolate Peanut Butter Cornflake Cookies: Add in some chocolate chips for an extra indulgent twist.
Melted chocolate: Add a drizzle of melted chocolate for an even more decadent treat.
Almond butter: Swap out the peanut butter for almond butter for a different flavor.
Serving and Storing No-Bake Cornflake Cookies
This easy dessert is a great choice for the holiday season; serve them at parties or box some up for a cookie swap. Of course, you can make this simple cookie recipe any time of year. Serve them with a cup of coffee, tea, or milk!
Store these chewy cookies in an airtight container at room temperature for 2-3 days or in the fridge for a week. If you have more than one layer of cookies to store, put down layers of wax paper in between to prevent cookies from sticking together.
Can you freeze these Peanut Butter Cornflake Cookies?
Yes, cornflake cookies freeze well! Place them in a single layer in a freezer-safe container and freeze for up to 3 months. Thaw overnight before serving.
Looking for more easy, no-bake recipes?
My most popular no-bake desserts are dream bars. Chocolate Peanut Butter Dream Bars are the ones that started it all. Similar to a Lush Dessert recipe, it’s comprised of layers that make every bite absolutely delicious.
If strawberries are your thing, then the Strawberry Cheesecake Dream Bars have your name written all over them. They’re delicious all year round, but we especially enjoy them when spring and summer hit.
Check out all my dream bars here.
Another very popular no-bake dessert is this No-Bake Lemon Cheesecake. This sweet, tangy dessert is perfect for a hot summer day when you want something refreshing.
Looking for a no-bake snack? Then these No-Bake Rice Krispies Granola Bars and No-Bake Peanut Butter Energy Bites need to be in your pantry. Each is full of flavor, and the whole family will enjoy them!
Happy baking (or NON-baking, in this case! 😉 haha)!
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No Bake Peanut Butter Cornflake Cookies
- 3 tablespoons butter
- 10 ounce miniature marshmallows
- ½ cup creamy peanut butter
- ½ teaspoon pure vanilla extract
- 6 cups corn flakes
- In a large pot, over medium low heat, melt the butter.
- Pour the marshmallows into the pot and stir until completely melted.
- Add peanut butter and vanilla and mix until thoroughly combined and peanut butter has melted. Turn off heat.
- Pour in the cornflakes and with a rubber spatula, mix until thoroughly coated.
- Using a tablespoon or small cookie scoop, place scoops of mixture onto a cookie sheet and form into a mound.
- Allow cookies to cool and harden for at least 15 minutes before serving.
This post was originally published May 27, 2020. It has been updated in format and with pictures on November 10, 2023.