Butterscotch Marshmallow Bars

If you love a sweet, gooey treat that’s quick and no-bake, these Butterscotch Marshmallow Bars are going to be your new go-to dessert. Loaded with rich butterscotch, creamy peanut butter, and fluffy marshmallows, they’re decadent, chewy, and perfect for sharing (or keeping all to yourself, I won’t judge!). For more of my easy, no-fuss treats, check out my collection of no-bake desserts.

What Are Butterscotch Marshmallow Bars?

These no-bake bars are made by melting butterscotch chips, peanut butter, and butter, then folding in marshmallows for a chewy, gooey treat. They’re sometimes called Church Basement Bars or Peanut Butter Marshmallow Squares because they’ve been a staple at potlucks and bake sales for decades. Love nostalgic, peanut butter–butterscotch desserts? Check out my Pretzel Scotcheroos for a salty-sweet twist on a classic!

Ingredients & Substitutions

• Unsalted Butter: Provides richness. Salted butter works, too; just skip extra salt if using.
• Butterscotch Chips: The star flavor! White chocolate chips can be a fun substitute, though the flavor will differ.
• Creamy Peanut Butter: Adds creaminess and a slight nutty flavor. Swap with almond or cashew butter for a different twist.
• Miniature Marshmallows: Give chew and volume. You can use regular-sized ones that are cut into small pieces if needed.

Tips for Perfect Butterscotch Marshmallow Bars

1. Don’t skip the cooling step before adding marshmallows. This keeps them from melting and losing their shape.
2. Press gently. Over-pressing the mixture can squish the marshmallows and make the bars too dense.
3. Mix-ins: Add chopped nuts, chocolate chips, or even a sprinkle of sea salt on top for a fun variation.

FAQs

Can I make these ahead of time?

Yes! You can make them and refrigerate until ready to serve, perfect for parties or holidays.

Can I use natural peanut butter?

Yes, but the texture may be slightly softer. Stir well before melting.

Can I skip the peanut butter?

You can, but it will change the flavor and texture. Try extra butterscotch chips or another nut butter instead.

Can I make these without a microwave?

Absolutely! Melt the butter, peanut butter, and butterscotch chips in a heatproof bowl over a double boiler on the stove.

Troubleshooting

• Bars too soft? They may need more chill time. Pop them back in the refrigerator for another hour.
• Bars too hard? They were probably over-pressed or stored too long in the refrigerator. Let them sit at room temperature before cutting.
• Marshmallows melted into the mix? The mixture wasn’t cooled enough before folding them in. Be patient, it’s worth it!

How to Store Butterscotch Marshmallow Bars

Room Temperature: Airtight container for up to 3 days.

Refrigerator: Store in an airtight container for up to 1 week. Bars are easier to cut when chilled.

Freezer: Wrap tightly and place in a freezer-safe bag for up to 1 month. Thaw at room temperature before serving.