Peanut Butter Cornflake Bars Recipe photo by Taste of Home

Peanut Butter Cornflake Cookies

Total Time
Prep: 15 min. + standing
Crunchy, sweet and incredibly easy to make, these peanut butter cornflake cookies are a no-bake treat perfect for any occasion. Quickly whip up a batch of these cookies with just four simple ingredients.

Updated: Jul. 05, 2024

Peanut butter cornflake cookies are a satisfyingly crunchy treat that’s quick to make. With just a few needed ingredients, these cookies are perfect for whipping up a batch whenever you need a sweet fix. The combination of creamy peanut butter and crispy cornflakes makes for a deliciously addictive snack that both kids and adults will love. No baking required!

Ingredients for Peanut Butter Cornflake Cookies

  • Creamy peanut butter: Peanut butter is the key ingredient that binds the cookies together. Substitute with your favorite nut butter if desired.
  • Sugar: Sweetens the dough and helps to create a slight caramelization when heated.  
  • Light corn syrup: Acts as a sweetener and binding agent, ensuring the cookies hold together.  
  • Cornflakes: Provide the signature crunch and a delicious contrast to the creamy peanut butter mixture. Rice Krispies or another cereal can be used as a substitute for different textures.


Step 1: Combine ingredients

Combine the creamy peanut butter, sugar, and light corn syrup in a large saucepan. Cook and stir over medium-low heat until the sugar is dissolved and the mixture is smooth.

Step 2: Add cornflakes

Remove the pan from heat and gently mix in the cornflakes until they’re fully coated with the peanut butter mixture.

Step 3: Shape 

Using a spoon, drop the mixture onto a greased or parchment-lined baking sheet, forming your desired-sized cookies. Press lightly to shape them. Let stand until set, about 1 hour.

Peanut Butter Cornflake Cookie Variations

  • Chocolate drizzle: Melt 1/2 cup of chocolate chips and drizzle over the cookies for a chocolatey touch.
  • Nutty twist: Add 1/2 cup of chopped nuts, such as peanuts or almonds, to the mixture before shaping the cookies for added crunch.
  • Marshmallow mix: Stir in mini-marshmallows with the cornflakes for a gooey and sweet variation.

How to Store Peanut Butter Cornflake Cookies

Store the cookies in an airtight container at room temperature. They’ll stay fresh for up to a week. For longer storage, place the cookies in the refrigerator, where they can last up to two weeks.

Can you freeze peanut butter cornflake cookies? 

Yes, you can freeze these cookies. Place them in a single layer on a baking sheet to freeze until solid, then transfer them to an airtight container or freezer bag. They will keep for up to three months.

Peanut Butter Cornflake Cookies Tips

Can I make these cookies without a stove? 

Yes, you can make these cookies using a microwave. Combine the peanut butter, sugar and light corn syrup in a microwave-safe bowl. Microwave the cookie dough mixture in 30-second intervals, stirring between each, until the sugar is dissolved and the mixture is smooth. Then, continue the rest of the recipe as directed.

How do I prevent the cookies from sticking?

Grease your spoon or hands lightly with cooking spray before shaping the cookies to prevent sticking.

Why are my cookies too hard? 

The cookies can become too hard if the mixture is cooked for too long or at too high of a temperature. Make sure to cook over medium-low heat and remove from heat as soon as the sugar dissolves.

How can I make these cookies gluten-free? 

To make these cornflake peanut butter cookies gluten-free, simply use gluten-free cornflakes. Ensure all other ingredients, such as the peanut butter, are certified gluten-free.

Watch how to Make Peanut Butter Cornflake Cookies

Peanut Butter Cornflake Bars

Prep Time 15 min
Yield 20 servings


  • 1-1/2 cups creamy peanut butter
  • 1 cup sugar
  • 1 cup light corn syrup
  • 6 cups cornflakes


  1. In a large saucepan, combine peanut butter, sugar and corn syrup. Cook and stir over medium-low heat until sugar is dissolved. Remove from heat; stir in cereal. Spread into a greased 13x9-in. pan; press lightly. Let stand until set, about 1 hour.

Nutrition Facts

1 bar: 234 calories, 10g fat (2g saturated fat), 0 cholesterol, 154mg sodium, 35g carbohydrate (26g sugars, 1g fiber), 5g protein.

Peanut Butter Cornflake Bars were one of my favorite treats when I was a little girl. They are very versatile. A friend likes to spread a cup of melted chocolate chips over the top. Bu sure to let the chocolate set before cutting into these simply delicious bars. —Laura Campbell, Lisbon, Maine
Recipe Creator