No-Bake Butterscotch Marshmallow Peanut Bars

Prep: 5 minCook: 5 min20 barsmediumAmerican
No-Bake Butterscotch Marshmallow Peanut Bars

These indulgent no-bake bars combine melted butterscotch chips with creamy peanut butter to create a rich base that binds together crunchy peanuts, cereal, and fluffy mini marshmallows. The result is a sweet and satisfying treat with varied textures in every bite. Perfect for potlucks, bake sales, or when you need a quick dessert without turning on the oven. The bars set up firm at room temperature and can be stored either on the counter or refrigerated for a firmer texture.

Ingredients

Yield: 20 bars
  • ½ cup butter, unsalted
    chocolate chips1:1sweetdairy-free

    similar melting properties

    Full guide →
  • 1 cup peanut butter, creamy or crunchy
  • 11 ounces butterscotch chips
    chocolate chips1:1sweetdairy-free

    similar melting properties

  • 2 cups peanuts
    chopped almonds1:1nutpeanuts-freeadds tree_nuts

    different flavor profile

    Full guide →
  • 1 cup cereal
  • 10 ounces mini marshmallows
    regular marshmallowsuse 2/3 amounttexture

    larger pieces

    Full guide →

Instructions

  1. 1

    Spray a 9x13-inch pan with non-stick spray or line with waxed paper or parchment paper

  2. 2

    Add butter, peanut butter, and butterscotch chips to a large, deep saucepan over medium-low heat

  3. 3

    Stir frequently until the mixture is completely melted and smooth

  4. 4

    Remove from heat and fold in peanuts, cereal, and marshmallows until everything is evenly coated

  5. 5

    Pour the mixture into prepared pan and spread evenly

  6. 6

    Cool completely before cutting, refrigerating if desired to speed cooling process

  7. 7

    Cut into bars once completely cooled

Tips

Tip 1

Use salted butter if preferred, but omit any additional salt from the recipe

Tip 2

Don't cover the pan until bars are completely cooled to prevent condensation

Tip 3

Refrigerate for firmer bars or keep at room temperature for softer texture

Good to Know

Storage

Store in an airtight container on the counter for up to 1 week or refrigerate for up to 2 weeks

Make Ahead

Can be made up to 3 days in advance and stored covered

Serve With

Serve at room temperature for softer texture or chilled for firmer bars

Common Mistakes

Watch

Don't cover while cooling to avoid condensation making bars soggy

Watch

Avoid high heat when melting to prevent scorching the mixture

Substitutions

Dairy-Free Swaps

butterscotch chips
chocolate chips1:1sweetdairy-free

similar melting properties

Full guide →

Nut-Free Alternatives

peanuts
chopped almonds1:1nutpeanuts-freeadds tree_nuts

different flavor profile

Full guide →

General Alternatives

Cheerios
Rice Krispies1:1texture

crunchier texture

mini marshmallows
regular marshmallowsuse 2/3 amounttexture

larger pieces

Full guide →
Find more substitutions →

FAQ

Can I use regular marshmallows instead of mini?

Yes, but use about 2/3 the amount and cut them into smaller pieces for better distribution throughout the bars.

How long do these bars keep?

They keep for up to 1 week at room temperature or 2 weeks refrigerated in an airtight container.

Can I freeze these bars?

Yes, wrap individual bars or store in freezer containers for up to 3 months. Thaw at room temperature before serving.