Peanut Butter Butterscotch Marshmallow Squares
A delightful no-bake treat, these classic squares come together quickly and require no oven, offering a perfect balance of sweet and salty with a wonderfully chewy texture that melts in your mouth. They are easy to make, calling for only four common ingredients, and bring a nostalgic feel with every bite.
Ingredients
- 0.5 cup unsalted butter or 1 stick
- 1 bag butterscotch chips 10 to 11-ounce
- 1 cup smooth peanut butter creamy recommended
- 1 bag mini marshmallows 16-ounce
Instructions
- Line a 9x13 inch baking pan with parchment paper, leaving an overhang on the sides. Set aside.
- In a medium to large saucepan, combine the unsalted butter, butterscotch chips, and smooth peanut butter. Place the saucepan over medium-low heat.
- Continuously stir the mixture with a rubber spatula or whisk until completely smooth and creamy. Keep the heat low to prevent scorching; do not let it boil.
- Remove the saucepan from the heat. Let the mixture cool for about 10-15 minutes until it is warm but not scalding hot.
- Pour the slightly cooled peanut butter mixture into a large mixing bowl. Add the entire bag of mini marshmallows.
- Using your rubber spatula, gently fold and stir the marshmallows into the mixture. Work quickly but carefully to coat all marshmallows, allowing most to retain their shape.
- Pour the marshmallow mixture into your prepared 9x13 inch baking pan. Use the back of your spatula, or lightly greased hands, to press the mixture down firmly and evenly.
- Place the pan in the refrigerator and chill for at least 1 to 2 hours, or until the squares are completely firm.
- Once firm, lift the parchment paper to remove the block from the pan. Place on a cutting board and cut into 24 squares (or your desired size).
Notes
For best results, keep heat on medium-low and stir constantly during melting to prevent scorching. Crucially, cool the melted mixture for 10-15 minutes before adding marshmallows to help them retain their shape and chewiness. Grease your spatula or hands when pressing the mixture into the pan to prevent sticking. Store these squares in an airtight container at room temperature for up to 3-4 days, or in the refrigerator for up to a week. They are also freezer-friendly: cut into individual squares, freeze in a single layer, then transfer to a freezer-safe bag for up to a month. Thaw at room temperature for a few minutes before enjoying. Variations include adding chopped nuts or Rice Krispies for crunch, or substituting/drizzling with chocolate chips for a different flavor profile.