Introduction
Craving a no-bake dessert that’s sweet, gooey, and packed with irresistible flavors? What if you could whip up a batch of decadent bars combining chocolate, peanut butter, butterscotch, and marshmallows in just a few minutes? Say hello to Chocolate Peanut Butter Butterscotch Marshmallow Bars! These easy, crowd-pleasing treats are perfect for potlucks, holiday trays, or satisfying your sweet tooth. With a rich, creamy base and chewy marshmallows, they’re a quick fix for any dessert lover. Ready to create some sticky, delicious magic? Let’s grab a microwave-safe bowl and get mixing!
Overview
Chocolate Peanut Butter Butterscotch Marshmallow Bars are no-bake dessert bars made with melted semi-sweet chocolate chips, butterscotch chips, and peanut butter, mixed with mini marshmallows and chilled until set. What makes them special? They’re incredibly simple to prepare, require no oven, and deliver a perfect blend of sweet, salty, and chewy textures. This beginner-friendly recipe takes about 2.5 hours (15 minutes prep, 2 hours chilling) and yields 24 bars, making it ideal for sharing or gifting.
- Time Requirement: 2.5 hours (15 minutes prep, 2 hours chilling)
- Difficulty Level: Easy (perfect for beginners)
- Servings: 24 bars
Essential Ingredients
The magic of these bars lies in their simple, bold ingredients. Here’s what you’ll need and why each one matters:
- Semi-Sweet Chocolate Chips (12 oz): Provide a rich, chocolatey base with balanced sweetness.
- Butterscotch Chips (11 oz): Add a caramel-like, buttery sweetness that complements the chocolate.
- Creamy Peanut Butter (1 cup): Brings a smooth, nutty flavor and helps bind the mixture.
- Mini Marshmallows (10.5 oz): Create a chewy, gooey texture and add sweetness.
Substitutions and Variations
- Chocolate Chips: Use milk chocolate for a sweeter flavor, dark chocolate for a richer taste, or dairy-free chocolate chips for a vegan version.
- Butterscotch Chips: Substitute with white chocolate chips, caramel chips, or additional chocolate chips if unavailable.
- Peanut Butter: Swap with almond butter, cashew butter, or sunflower seed butter for a nut-free option, ensuring a creamy consistency.
- Marshmallows: Use regular-sized marshmallows (cut into smaller pieces) or vegan marshmallows for a plant-based version.
- Add-Ins: Mix in ½ cup chopped peanuts, pretzel pieces, or crushed graham crackers for extra crunch, or swirl in ¼ cup caramel sauce for decadence.
- Gluten-Free Option: Ensure all ingredients (especially marshmallows and chips) are gluten-free; most are naturally gluten-free.
- Vegan Option: Use dairy-free chocolate chips, vegan butterscotch chips (or white chocolate), and vegan marshmallows.

Step-by-Step Instructions
Making Chocolate Peanut Butter Butterscotch Marshmallow Bars is quick and fuss-free with a microwave method. Follow these instructions for perfect bars every time:
- Prepare the Pan:
- Line a 9×13-inch baking dish with non-stick aluminum foil, leaving an overhang for easy removal. Alternatively, grease the pan with butter or spray with non-stick spray and line with parchment paper.
- Tip: The foil overhang makes lifting the bars out easier for clean cutting.
- Melt the Base:
- In a large microwave-safe container (such as an 8-cup Pyrex measuring cup), combine 12 oz semi-sweet chocolate chips, 11 oz butterscotch chips, and 1 cup creamy peanut butter.
- Microwave on high in 30-second intervals, stirring well after each interval, until the chips are fully melted, the peanut butter is incorporated, and the mixture is smooth, about 90–120 seconds total.
- Tip: Stir thoroughly to ensure even melting and prevent scorching. Stop heating once most chips are melted, using residual heat to finish.
- Add the Marshmallows:
- Gently stir in 10.5 oz mini marshmallows until they are fully coated with the chocolate-peanut butter mixture. Work quickly to avoid melting the marshmallows.
- Tip: Fold gently to keep marshmallows intact, ensuring an even distribution for a balanced texture.
- Set the Bars:
- Pour the mixture into the prepared 9×13-inch baking dish, spreading evenly with a spatula to create a smooth, uniform layer.
- Tap the pan lightly on the counter to remove air bubbles and ensure an even surface.
- Tip: Press gently to avoid crushing the marshmallows, and smooth the top for a polished look.
- Chill and Cut:
- Refrigerate the pan for about 2 hours, or until the bars are fully set and firm to the touch.
- Lift the bars out of the pan using the foil overhang, and place on a cutting board. Cut into 24 bars (6×4 grid) using a sharp knife.
- Tip: Run the knife under hot water and wipe clean between cuts for neat, clean edges.
- Serve:
- Serve chilled or at room temperature, optionally garnished with a sprinkle of sea salt, chopped peanuts, or a drizzle of melted chocolate.
- Store leftovers in an airtight container to maintain freshness.
- Tip: Serve on a platter or in paper liners for a festive presentation, perfect for parties or gifting.

Assembly
Assembling Chocolate Peanut Butter Butterscotch Marshmallow Bars is all about creating a gooey, flavorful treat with minimal effort. Here’s how to make them look and taste incredible:
- Mix Thoughtfully: Melt the chips and peanut butter until smooth, and fold in marshmallows gently to maintain their shape and create a chewy texture.
- Presentation Tips:
- Spread the mixture evenly in the pan for uniform bars, and chill thoroughly for clean cutting.
- Garnish with extra marshmallows, crushed butterscotch candies, or a dusting of powdered sugar for a decorative touch.
- Arrange bars in a gift tin, on a dessert tray, or in colorful paper liners for holiday trays, potlucks, or bake sales.
- Pair with a glass of milk, hot cocoa, or coffee for a complete dessert experience, perfect for casual gatherings or festive occasions.
Storage and Make-Ahead Tips
These bars are best chilled and can be prepped or stored with these tips to maintain their quality:
- Make-Ahead:
- Prepare the bars up to 3 days in advance, cut, and store in an airtight container in the fridge. Serve chilled or let sit at room temperature for 10–15 minutes for a softer texture.
- Mix the chocolate-peanut butter base (without marshmallows) up to 1 day ahead, store in the fridge, and reheat gently before adding marshmallows.
- Tip: Add marshmallows just before chilling to prevent them from softening too much.
- Storage:
- Store bars in an airtight container in the refrigerator for up to 1 week to maintain texture and prevent melting.
- Layer with parchment or wax paper to prevent sticking, especially in warmer climates.
- Tip: Keep refrigerated until serving to preserve the firm, chewy texture.
- Freezing:
- Freeze bars in an airtight container or freezer bag, layered with parchment paper, for up to 2 months. Thaw in the fridge for 4–6 hours or at room temperature for 1 hour before serving.
- Freeze uncut bars for easier storage, then thaw and cut when ready to serve.
- Tip: Wrap tightly to prevent freezer burn, and avoid freezing for too long to maintain marshmallow texture.
Recipe Variations
Chocolate Peanut Butter Butterscotch Marshmallow Bars are versatile and fun to customize. Here are some creative twists to try:
- Rocky Road Bars: Replace butterscotch chips with additional chocolate chips and add ½ cup chopped almonds for a rocky road vibe.
- Salted Caramel Bars: Swirl ¼ cup caramel sauce into the mixture and sprinkle with sea salt before chilling.
- White Chocolate Pretzel Bars: Use white chocolate chips instead of butterscotch and add ½ cup crushed pretzels for a sweet-salty crunch.
- Mocha Marshmallow Bars: Add 1 tsp instant coffee to the chocolate mixture for a mocha flavor.
- Gluten-Free Bars: Ensure all ingredients (chocolate chips, butterscotch chips, marshmallows) are gluten-free; most are naturally gluten-free.
- Vegan Bars: Use dairy-free chocolate chips, vegan butterscotch or white chocolate chips, vegan marshmallows, and plant-based peanut butter.
Conclusion
You’re now ready to create Chocolate Peanut Butter Butterscotch Marshmallow Bars that are as easy as they are irresistible! This 2.5-hour recipe is perfect for potlucks, holiday trays, or anytime you need a quick, no-bake dessert. With their rich chocolate-peanut butter base, sweet butterscotch notes, and chewy marshmallows, these bars are a guaranteed hit. Feel free to tweak the add-ins, flavors, or garnishes to make them your own. Grab your microwave-safe bowl, melt those chips, and enjoy every gooey, sweet bite. Happy mixing, and savor the decadent deliciousness!
Print
Chocolate Peanut Butter Butterscotch Marshmallow Bars
Description
Craving a no-bake dessert that’s sweet, gooey, and packed with irresistible flavors? What if you could whip up a batch of decadent bars combining chocolate, peanut butter, butterscotch, and marshmallows in just a few minutes? Say hello to Chocolate Peanut Butter Butterscotch Marshmallow Bars! These easy, crowd-pleasing treats are perfect for potlucks, holiday trays, or satisfying your sweet tooth. With a rich, creamy base and chewy marshmallows, they’re a quick fix for any dessert lover.
Ingredients
The magic of these bars lies in their simple, bold ingredients. Here’s what you’ll need and why each one matters:
-
Semi-Sweet Chocolate Chips (12 oz): Provide a rich, chocolatey base with balanced sweetness.
-
Butterscotch Chips (11 oz): Add a caramel-like, buttery sweetness that complements the chocolate.
-
Creamy Peanut Butter (1 cup): Brings a smooth, nutty flavor and helps bind the mixture.
-
Mini Marshmallows (10.5 oz): Create a chewy, gooey texture and add sweetness.
Substitutions and Variations
-
Chocolate Chips: Use milk chocolate for a sweeter flavor, dark chocolate for a richer taste, or dairy-free chocolate chips for a vegan version.
-
Butterscotch Chips: Substitute with white chocolate chips, caramel chips, or additional chocolate chips if unavailable.
-
Peanut Butter: Swap with almond butter, cashew butter, or sunflower seed butter for a nut-free option, ensuring a creamy consistency.
-
Marshmallows: Use regular-sized marshmallows (cut into smaller pieces) or vegan marshmallows for a plant-based version.
-
Add-Ins: Mix in ½ cup chopped peanuts, pretzel pieces, or crushed graham crackers for extra crunch, or swirl in ¼ cup caramel sauce for decadence.
-
Gluten-Free Option: Ensure all ingredients (especially marshmallows and chips) are gluten-free; most are naturally gluten-free.
-
Vegan Option: Use dairy-free chocolate chips, vegan butterscotch chips (or white chocolate), and vegan marshmallows.
Instructions
-
Prepare the Pan:
-
Line a 9×13-inch baking dish with non-stick aluminum foil, leaving an overhang for easy removal. Alternatively, grease the pan with butter or spray with non-stick spray and line with parchment paper.
-
Tip: The foil overhang makes lifting the bars out easier for clean cutting.
-
-
Melt the Base:
-
In a large microwave-safe container (such as an 8-cup Pyrex measuring cup), combine 12 oz semi-sweet chocolate chips, 11 oz butterscotch chips, and 1 cup creamy peanut butter.
-
Microwave on high in 30-second intervals, stirring well after each interval, until the chips are fully melted, the peanut butter is incorporated, and the mixture is smooth, about 90–120 seconds total.
-
Tip: Stir thoroughly to ensure even melting and prevent scorching. Stop heating once most chips are melted, using residual heat to finish.
-
-
Add the Marshmallows:
-
Gently stir in 10.5 oz mini marshmallows until they are fully coated with the chocolate-peanut butter mixture. Work quickly to avoid melting the marshmallows.
-
Tip: Fold gently to keep marshmallows intact, ensuring an even distribution for a balanced texture.
-
-
Set the Bars:
-
Pour the mixture into the prepared 9×13-inch baking dish, spreading evenly with a spatula to create a smooth, uniform layer.
-
Tap the pan lightly on the counter to remove air bubbles and ensure an even surface.
-
Tip: Press gently to avoid crushing the marshmallows, and smooth the top for a polished look.
-
-
Chill and Cut:
-
Refrigerate the pan for about 2 hours, or until the bars are fully set and firm to the touch.
-
Lift the bars out of the pan using the foil overhang, and place on a cutting board. Cut into 24 bars (6×4 grid) using a sharp knife.
-
Tip: Run the knife under hot water and wipe clean between cuts for neat, clean edges.
-
-
Serve:
-
Serve chilled or at room temperature, optionally garnished with a sprinkle of sea salt, chopped peanuts, or a drizzle of melted chocolate.
-
Store leftovers in an airtight container to maintain freshness.
-
Tip: Serve on a platter or in paper liners for a festive presentation, perfect for parties or gifting
-
FAQs
1. Can I use crunchy peanut butter?
Yes, but creamy peanut butter creates a smoother texture. Crunchy will add extra texture but may make the bars slightly grainier.
2. Are these bars healthy?
They’re an indulgent treat, but you can lighten them by using natural peanut butter, reducing marshmallows to 8 oz, or cutting smaller bars. Enjoy in moderation.
3. Can I make these vegan?
Yes! Use dairy-free chocolate chips, vegan butterscotch or white chocolate chips, vegan marshmallows, and plant-based peanut butter. Ensure all ingredients are vegan-friendly.
4. Why are my bars too soft?
Insufficient chilling or overheating the mixture can cause softness. Chill for at least 2 hours, and avoid over-melting the chips to preserve the structure.
5. Can I use a different pan size?
Yes! An 8×8-inch pan will yield thicker bars (chill longer, about 3 hours), while an 11×7-inch pan will make slightly thinner bars. Adjust cutting for desired portions.
6. How do I prevent marshmallows from melting?
Stir marshmallows into the melted mixture quickly and gently, ensuring the chocolate mixture isn’t too hot. Work fast to transfer to the pan and chill.
7. Can I prep these for a party?
Yes! Make up to 3 days ahead, store in the fridge, and cut just before serving. Add garnishes like chocolate drizzles or nuts at serving time for freshness.
8. What’s the best way to store leftovers?
Store in an airtight container in the fridge for up to 1 week. Layer with parchment to prevent sticking, and serve chilled or at room temperature.