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Peanut butter rice krispies treats stacked in squares, loaded with gooey peanut butter, crispy cereal, and mini marshmallows.

Ultra-Soft Peanut Butter Rice Krispies Treats with Marshmallow Swirl


  • Author: Samantha Brooks
  • Total Time: 15 minutes
  • Yield: 16 squares 1x
  • Diet: Vegetarian

Description

The ultimate upgrade to a beloved childhood classic. By blending smooth, creamy peanut butter into a base of melted marshmallows and salted butter, these treats stay incredibly soft and tender for days with a deep, nutty flavor.


Ingredients

Scale
  • 4 tbsp salted butter
  • 10 oz bag mini marshmallows (approx. 5 cups)
  • 1/2 cup creamy peanut butter
  • 1/2 tsp vanilla extract
  • 6 cups Rice Krispies cereal

Instructions

Melt: Melt salted butter in a large pot over low heat. Add mini marshmallows and creamy peanut butter.

Stir: Cook and stir constantly over low heat until marshmallows are completely melted and the mixture is uniform.

Fold: Remove from heat. Stir in vanilla, then gently fold in Rice Krispies cereal until every piece is coated.

Press: Transfer to a greased 9×9-inch pan. Gently pat into an even layer using a greased spatula (do not pack down tightly).

Set: Let sit at room temperature for 30–45 minutes until firm before slicing into squares.

Notes

The Gentle Touch: Do not pack the mixture down tightly into the pan. A light touch keeps the bars airy and soft rather than hard and dense.

Low Heat is Vital: Rushing with high heat overcooks the marshmallow sugars, causing the treats to become rubbery once cooled.

Peanut Butter Tip: Use standard creamy peanut butter (like Jif). Natural varieties can be too oily and may prevent the treats from setting properly.

  • Prep Time: 15 minutes
  • Cook Time: 0 minutes
  • Category: Dessert / Snack
  • Method: No-Bake / Stovetop
  • Cuisine: American

Nutrition

  • Serving Size: 1 square
  • Calories: 185
  • Sugar: 16
  • Sodium: 145
  • Fat: 8
  • Saturated Fat: 3.5
  • Unsaturated Fat: 4.5
  • Trans Fat: 0
  • Carbohydrates: 28
  • Fiber: 1
  • Protein: 3
  • Cholesterol: 8

Keywords: peanut butter rice krispies treats, no bake peanut butter bars, marshmallow cereal treats, soft rice krispies recipe