Peanut Butter Crunch Cookies

Peanut Butter Crunch Cookie lifted with a spatula above a tray of freshly made cookies.

Peanut Butter Crunch Cookies

These Peanut Butter Crunch Cookies combine creamy peanut butter, Frosted Flakes, and a sweet syrup coating for an easy no-bake cookie everyone loves. Perfect for holidays, bake sales, and family treats.

Prep Time15

Set Time30

Total Time45

Servings:

Calories: 187kcal

Author: Karin and Ken

Ingredients

1 cup granulated sugar
1 cup light corn syrup
1 cup creamy peanut butter or crunchy peanut butter
2 tablespoons butter
1 teaspoon vanilla extract
6 ½ cups Frosted Flakes or corn flakes

Instructions

In a large saucepan, combine the sugar, corn syrup, peanut butter, and butter. Cook over medium heat, stirring constantly, until the mixture is smooth and reaches a full boil.
Immediately remove the saucepan from the heat and stir in the vanilla extract. Add the Frosted Flakes and gently fold until every flake is evenly coated in the peanut butter mixture.
Working quickly before the mixture begins to cool, use an ice cream scoop or cookie scoop to drop portions onto parchment paper, leaving a little space between each cookie.
Allow the cookies to cool on the parchment paper at room temperature for 20 to 30 minutes, or until firm and easy to handle. Serve and enjoy.

Notes

Cereal options: Frosted Flakes create a sweeter cookie, while regular corn flakes make a less sweet, more traditional version.
Room temperature setting: These cookies typically set in 20 to 30 minutes at room temperature. If your kitchen is particularly warm, they may take a little longer. For faster setting, place the cookies in the refrigerator for 10 to 15 minutes.
Work quickly and stir constantly: Keep the mixture moving while it cooks to prevent scorching, and have your parchment paper ready because the cookies begin setting as soon as the cereal is added.
Cook the syrup properly: Remove the saucepan from the heat as soon as the mixture reaches a full boil. Overcooking can make the cookies hard instead of tender and chewy.
Protect the crunch: Gently fold in the Frosted Flakes to avoid crushing them and use creamy peanut butter for the smoothest texture and best consistency.
Shape and cool for success: Use a cookie scoop for evenly sized cookies and allow them to cool completely so they can firm up and hold their shape.
Customize and store carefully: Let the mixture cool slightly before adding mix-ins like chocolate chips or candies, then store the cookies in an airtight container to keep them fresh and crunchy.

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