Cornflake Cookies are super addictive, with an absolutely irresistible mix of crunchy cereal flakes, sweet sugar and salty peanut butter! These simple no bake cookies are quick and easy to whip up with just 5 ingredients. Delicious drop cookies that are full of nostalgic flavor and chewy goodness. The perfect treat for kiddos and adults!

No bake peanut butter cornflake cookies are great anytime of the year, but they are especially perfect for cookie exchanges, gift giving and parties during the holiday season.

peanut butter cornflake cookies

Grandma’s Peanut Butter Cornflake Cookies

I’m so in love with these childhood favorites. Not only are they incredibly tasty, but you can whip them up so fast – just a few minutes on the stovetop, then plop them down on some wax paper and let them set (or don’t!). As an added plus, you’ll only need 5 simple ingredients. Easy, delicious recipes like this one are the BEST!!

Peanut butter cornflake cookies are a family favorite, my grandma made this cornflake cookie recipe all the time when we were growing up and I continue to make it for my kids.

Traditionally, no bake cookies have an oatmeal base, but for this recipe, Corn Flakes are the base of the cookie! Actually, my grandma always used Special K cereal, not Corn Flakes. Special K is a bit puffier and sweeter than Corn Flakes cereal. Special K cereal pairs with the creamy peanut butter to create a wonderfully sweet and salty cookie!

cornflake cookie bitten into

Ingredients in cornflake cookies

Just 5 simple ingredients is all you need! You might even have all of the ingredients you need to make my easy peanut butter Corn Flake cookies in your pantry right now. If that’s the case, I recommend you go make some right now. Trust me, you’re going to love them!

  • Sugar. Regular, granulated sugar is a must for these cookies! It helps them cook and set with the best texture.
  • Light Karo corn syrup. Karo syrup is a brand of corn syrup, which gives cornflake cookies extra sweetness and a chewy, moist texture. Be sure to use light!
  • Peanut butter. The creamy type works best. I don’t recommend using a natural peanut butter or one that’s runny. I like to use Jif or Skippy peanut butter.
  • Cereal. Special K cereal flakes are puffy and sweet! They remind me of a flat version of Rice Krispies. I prefer to use them instead of Corn Flakes, which tend to be a bit sharp and bland. If you prefer to use Corn Flakes, simply use 2 extra cups.
  • Vanilla. For extra delicious flavor!
mixing cornflakes with peanut butter and corn syrup

How to make no bake cornflake cookies

Grab the ingredients, your healthiest appetite (and by healthy I mean BIG), and get ready for some awesome no-baking! This cornflake cookie recipe is so easy!

  1. Combine sugar and corn syrup. In a large saucepan, bring sugar and syrup to a boil; stirring frequently.
  2. Stir in peanut butter. Once the mixture begins to boil, remove the pan from heat and stir in peanut butter until smooth.
  3. Mix in cereal and vanilla. Stir the cereal and vanilla into the peanut butter mixture.
  4. Drop cookies onto parchment paper. Once cereal is fully coated in peanut butter mixture, drop spoonfuls onto parchment or wax paper.
  5. Cool. After about 30 minutes and when the cookies are completely cool and set, enjoy! Store at room temperature for up to about one week.
drop spoonfuls of peanut butter mixture onto parchment paper


  • This recipe moves quickly! Have all ingredients measured out and ready before you start cooking.
  • You can make the cookies whatever size you desire. However, I usually make them around 2 inches in size for easier storage and snacking.
  • Once you drop the cookies on the parchment paper, go back and shape each one together for perfect form.
  • When storing, add a piece of wax or parchment paper in between each layer of cookies so that they don’t stick together.


  • Once set, drizzle melted chocolate over the tops of cookies for a pretty presentation and yummy chocolate flavor.
  • You can stir in a variety of favorite add-ins! Try mixing in about 1/2 cup shredded coconut, mini M&Ms, mini marshmallows or chopped nuts.
  • Customize your cornflake cookies for any holiday by adding fun and festive sprinkles. Choose a color or sprinkle fitting for the occasion and you’ve got an easy no-bake treat to match your event. Before setting and while still warm, add sprinkles over the tops of cookies.
no bake peanut butter cookies

Storing and freezing

Store cookies in an airtight container or bag for up to about one week, maybe slightly longer. You can also store them in the fridge, which extends their shelf life to about two weeks. However, I don’t think they would ever last that long. 😉

They also freeze well. Once they’re completely cooled and set, add them to a freezer bag or container and store in the freezer for up to 1 month. When ready to enjoy, remove from freezer about 10 to 15 minutes beforehand.

cornflake cookies on a wire cooling rack

My grandma’s recipe for cornflake cookies have always had a special place in my Christmas cookie tins. It’s one of my absolute favorite cookies to enjoy during the holidays. These also are perfect for cookie exchanges and they make a fabulous addition to any dessert table. Cornflake cookies disappear quick! And everyone will be asking for the recipe!

More favorite sweet treats to try

Chocolate Peanut Butter No Bake Cookies

Chewy Chocolate Chip Cookies

Mini Pecan Pies

Best Banana Pudding

If you try these peanut butter cornflake cookies, let me know! Leave a comment and if your family loves them as much as mine does, be sure to give it a five star ⭐️ rating! Also, tag @kimscravings on Instagram with a picture of your creation. It’s so fun to see what you’re cooking! Be sure to subscribe to our mailing list to receive more healthy delicious recipes straight to your inbox.

bite taken out of a cornflake cookie
peanut butter cornflake cookies
5 from 6 votes
Nutrition Facts
Cornflake Cookies
Amount Per Serving (1 cookie)
Calories 153 Calories from Fat 45
% Daily Value*
Fat 5g8%
Saturated Fat 1g6%
Sodium 92mg4%
Potassium 78mg2%
Carbohydrates 25g8%
Fiber 1g4%
Sugar 21g23%
Protein 3g6%
Vitamin A 83IU2%
Vitamin C 1mg1%
Calcium 6mg1%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.
Servings:24 cookies
Cornflake Cookies
Prep Time:
10 mins
Cook Time:
5 mins
Total Time:
15 mins

Cornflake Cookies are super addictive, with an absolutely irresistible mix of crunchy cereal flakes, sweet sugar and salty peanut butter! These simple no bake cookies are quick and easy to whip up with just 5 ingredients.

  • 1 cup sugar
  • 1 cup light Karo corn syrup
  • 1 cup peanut butter*
  • 4 cups Special K Cereal or Corn Flakes Cereal**
  • 2 teaspoons vanilla extract
  1. In a large saucepan, bring sugar and syrup to a boil over medium heat. Do not over cook.
  2. Take the pan off the burner and blend in peanut butter. Once smooth, stir in cereal and vanilla.
  3. Once cereal is fully coated, use a spoon to drop the cookies onto parchment or wax paper to cool.

  4. Once completely cool, store in an airtight container at room temperature for about a week.
Recipe Notes

*I don't recommend using a natural peanut butter or one that's runny. I like to use Jif or Skippy peanut butter.

**We really love Special K cereal for these cookies! Corn Flakes are less puffy, so if you use that variety of cereal, increase the amount to 6 cups. 

Photos from Molly at Yes to Yolks.

Author: Kim
Course: Dessert
Cuisine: American
Keyword: cornflake cookies, peanut butter no bake cookies, special K cookies

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