Name: Crunchy Peanut Butter Bars
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Yield: 12 Servings
Cuisine: American

It is a Keeper Verified

February 16, 2026

These Crunchy Peanut Butter Bars have it all. They are soft and crunchy, salty and sweet. They are the perfect treat you need to try! This crunchy peanut butter bars are a next level rice crispy treat. It a wonderful dessert recipe to share with the whole family. If you are a fan of rice krispy treat, then you will love this chewy peanut butter bar that also has a little crunchy.

From the Cook

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Crunchy Peanut Butter Bars

It is a Keeper Verified

Ingredients

WarningMilk and 7 other allergens identified

Instructions

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Instructions

Preheat oven to 350 degrees.

In a large bowl combine cake mix, butter, egg, and beat low until crumbly.

Press in bottom of greased 13×9 pan.

Bake 350 for 12-18 minutes until golden brown.

Remove, add marshmallows on top, return to oven 1-2 minutes until puffy.

Cool while preparing topping.

Topping

In a large saucepan, combine all topping ingredients except cereal and peanuts.

Heat until smooth stirring constantly.

Remove from heat, stir in cereal and peanuts, immediately spoon over marshmallows.

Spread to cover.

Refrigerate for one hour or let cool room temperature until firm and cut into bars.

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My Calorie Intake

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Tips & Tricks (5)

Marshmallow Melting Magic 🔥
Melt marshmallows slowly over low heat, stirring constantly to prevent burning and ensure a smooth, even texture.
Crispy Cereal Secret 🥣
Toast the rice cereal briefly in a dry pan before mixing to enhance its crunchiness and add a nutty depth of flavor.
Peanut Butter Binding Technique 🥜
Mix peanut butter with warm ingredients while they're still hot to create a seamless, smooth mixture that binds perfectly.
Pan Preparation Pro Tip 🧈
Line your baking pan with parchment paper and lightly grease it to ensure easy removal and clean cutting of the bars.
Cooling & Setting Strategy 🧊
Allow the bars to cool completely at room temperature for at least 1 hour to achieve the ideal texture and prevent crumbling.

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About the Cook

It is a Keeper

Hi! I’m Christina… welcome to my kitchen! It’s so nice to meet you! I share tried and true recipes that anyone can make. I believe, if you can read, you can cook.