If you love easy desserts with rich butterscotch flavor, soft marshmallows, and a delicious chewy texture, these Butterscotch Marshmallow Bars are a must-try. They are sweet, buttery, tender, and packed with the classic combination of creamy butterscotch and fluffy marshmallows.

These homemade butterscotch bars are especially convenient when you want a dessert that looks impressive without spending hours in the kitchen. The simple preparation makes them perfect for holiday cookie trays, bake sales, potlucks, family gatherings, afternoon snacks, and everyday desserts.

The combination of melted butterscotch chips, butter, marshmallows, coconut, and crunchy nuts creates layers of flavor and texture in every bite. The butterscotch provides a deep caramel-like sweetness, while the marshmallows add softness and chewiness. Coconut gives the bars a pleasant texture, and chopped pecans or walnuts add a satisfying crunch.

One of the best things about this Butterscotch Marshmallow Bars recipe is how easy it is to customize. You can use pecans, walnuts, almonds, or leave the nuts out completely. You can also add chocolate chips, drizzle melted chocolate over the finished bars, or sprinkle them with flaky sea salt for an extra-special dessert.

Whether you call them butterscotch marshmallow squares, marshmallow bars, or easy butterscotch dessert bars, this recipe is a delicious way to make a simple homemade treat that everyone will enjoy.

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Ingredients:

For the Butterscotch Marshmallow Bars:

• 1 cup unsalted butter
• 1 cup butterscotch chips
• 1 cup packed light brown sugar
• 2 large eggs
• 2 teaspoons pure vanilla extract
• 1 ½ cups all-purpose flour
• 1 teaspoon baking powder
• ½ teaspoon salt
• 2 cups miniature marshmallows
• 1 cup sweetened shredded coconut
• 1 cup chopped pecans or walnuts
• ½ cup additional butterscotch chips, optional

Optional Topping:

• ½ cup butterscotch chips
• 1 teaspoon vegetable shortening or coconut oil
• Chopped pecans for garnish
• Flaked sea salt, optional

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Preparation:

Step 1: Prepare the Baking Pan

Preheat your oven to 350°F (175°C).

Grease a 9 × 13-inch baking pan with butter or nonstick cooking spray. For easier removal, line the bottom with parchment paper, leaving a little overhang on two sides.

The parchment makes it much easier to lift the cooled bars from the pan before slicing.

Step 2: Melt the Butter and Butterscotch

Place the butter and 1 cup of butterscotch chips in a medium saucepan over low heat.

Stir continuously until the butter and butterscotch chips are completely melted and smooth.

Do not use high heat because butterscotch chips can scorch or become grainy if overheated.

Remove the saucepan from the heat and allow the mixture to cool slightly.

Step 3: Combine the Wet Ingredients

In a large mixing bowl, whisk together the brown sugar, eggs, and vanilla extract.

Whisk until the mixture is smooth and well combined.

Slowly pour in the slightly cooled melted butterscotch mixture while stirring continuously.

Mix until everything is evenly incorporated.

Step 4: Mix the Dry Ingredients

In a separate bowl, whisk together the all-purpose flour, baking powder, and salt.

Adding the dry ingredients separately helps distribute the baking powder and salt evenly throughout the batter.

Step 5: Combine the Batter

Gradually add the dry ingredients to the wet mixture.

Stir gently with a spatula or wooden spoon until just combined.

Do not overmix the batter. Overmixing can make the finished bars tougher instead of soft and tender.

Step 6: Add the Coconut and Nuts

Fold in the shredded coconut and chopped pecans or walnuts.

If you want an even stronger butterscotch flavor, you can also fold in an additional ½ cup of butterscotch chips.

Mix just until the ingredients are evenly distributed.

Step 7: Prepare the Batter for Baking

Transfer the batter to the prepared 9 × 13-inch baking pan.

Use a spatula to spread it evenly into the corners.

The batter will be thick, so gently press and smooth the surface rather than trying to pour it into the pan.

Step 8: Add the Marshmallows

Sprinkle the miniature marshmallows evenly over the top of the batter.

Press a few lightly into the surface if desired, but avoid pushing all of them deeply into the batter.

The marshmallows will soften and become wonderfully gooey as the bars bake.

Step 9: Bake the Bars

Place the pan in the preheated oven and bake for approximately 25–30 minutes.

The edges should look set and lightly golden, while the center should remain soft.

Be careful not to overbake the bars. They will continue to firm up as they cool.

Step 10: Cool Completely

Remove the pan from the oven and place it on a wire rack.

Allow the bars to cool completely in the pan.

For cleaner slices, refrigerate them for about 30–60 minutes after they have cooled to room temperature.

Step 11: Add the Optional Butterscotch Drizzle

For an extra layer of flavor, melt ½ cup butterscotch chips with 1 teaspoon of shortening or coconut oil.

Stir until smooth.

Drizzle the melted butterscotch over the cooled bars.

You can also sprinkle chopped pecans or a small amount of flaky sea salt over the drizzle before it sets.

Step 12: Slice and Serve

Once the topping has set, lift the bars from the pan using the parchment paper.

Place them on a cutting board and cut into squares or rectangles.

For small dessert portions, cut the pan into 24 pieces. For larger bakery-style bars, cut into 12–16 pieces.

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Variation:

Chocolate Butterscotch Marshmallow Bars

Add ½ cup chocolate chips to the batter for a delicious chocolate-and-butterscotch combination.

Peanut Butter Butterscotch Bars

Add ½ cup creamy peanut butter to the melted butter and butterscotch mixture. Stir until completely smooth before adding the remaining ingredients.

Coconut Butterscotch Bars

Increase the shredded coconut to 1 ½ cups for a stronger coconut flavor and a chewier texture.

Chocolate Drizzled Bars

Instead of a butterscotch topping, drizzle melted semisweet or milk chocolate over the cooled bars.

Salted Butterscotch Marshmallow Bars

Add a light sprinkle of flaky sea salt over the finished butterscotch drizzle. The salty contrast balances the sweetness beautifully.

Nut-Free Version

Simply omit the pecans or walnuts. The bars will still have plenty of flavor and texture from the coconut and marshmallows.

Holiday Butterscotch Bars

Add festive sprinkles to the melted topping before it sets. These bars are especially attractive on Christmas dessert trays and holiday cookie platters.

White Chocolate Version

Replace part of the butterscotch chips with white chocolate chips for a creamy, sweet variation.

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COOKING Note:

The most important tip when making Butterscotch Marshmallow Bars is to avoid overbaking them. The center should still look slightly soft when the bars come out of the oven.

Because the marshmallows contain moisture and the bars continue cooking from residual heat after leaving the oven, baking them until completely firm can result in a dry or hard texture.

Allow the bars to cool completely before slicing. Warm bars will be softer and may be difficult to cut neatly.

When melting butterscotch chips, use low heat and stir frequently. If the chips become too hot, they can seize or develop an unpleasant texture.

For clean, professional-looking squares, chill the finished bars before cutting them with a sharp knife.

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Serving Suggestions:

Serve these Butterscotch Marshmallow Bars at room temperature with:

• A cup of coffee
• Hot tea
• Cold milk
• Hot chocolate
• Vanilla ice cream
• Caramel ice cream
• Whipped cream
• A drizzle of caramel sauce
• Extra melted butterscotch
• Chopped pecans or walnuts

For a simple dessert platter, arrange the bars alongside cookies, brownies, blondies, and other homemade treats.

They are also perfect for potlucks, bake sales, school events, family gatherings, holiday parties, cookie exchanges, and afternoon snacks.

For an indulgent dessert, warm one bar slightly and serve it with a scoop of vanilla ice cream. The combination of warm butterscotch, soft marshmallow, and cold creamy ice cream is especially delicious.

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Tips:

1. Use good-quality butterscotch chips for the best flavor and smoothest texture.
2. Do not overheat the butterscotch. Melt it slowly over low heat and stir frequently.
3. Do not overmix the batter. Mix only until the flour disappears.
4. Avoid overbaking. Slightly underbaked centers help create soft and chewy bars.
5. Use parchment paper to make removing the bars from the pan much easier.
6. Cool completely before cutting. This gives the bars time to set.
7. Chill before slicing if you want very clean and even squares.
8. Toast the pecans before adding them for a deeper, nuttier flavor.
9. Use mini marshmallows so they distribute evenly throughout the surface.
10. Do not press all the marshmallows deeply into the batter. Leaving some on top creates a beautiful golden, gooey finish.
11. Add flaky sea salt if you enjoy a sweet-and-salty dessert.
12. Store the bars properly. Keep them in an airtight container at room temperature for several days.
13. For softer bars, place parchment between layers when stacking them.
14. For firmer bars, refrigerate them before serving.
15. Cut smaller squares because these bars are rich and sweet.

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Prep Time:

15 minutes

Cooking Time:

25–30 minutes

Cooling Time:

1 hour

Total Time:

Approximately 1 hour 45 minutes

Servings:

16–24 bars

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Nutritional Information:

Approximate values per serving and will vary depending on the ingredients, portion size, nuts, and toppings used.

• Calories: Approximately 250–290
• Protein: Approximately 3–4 g
• Sodium: Approximately 130–180 mg

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FAQs

Can I make Butterscotch Marshmallow Bars without nuts?

Yes. Simply leave out the pecans or walnuts. The bars will still be soft, chewy, and flavorful.

Can I use salted butter?

Yes. If using salted butter, reduce or omit the additional salt in the recipe.

Can I use large marshmallows?

Miniature marshmallows are recommended because they distribute more evenly. If using large marshmallows, cut them into smaller pieces before adding them.

Why are my butterscotch chips not melting smoothly?

Butterscotch chips can become difficult to melt if they are overheated. Use low heat and stir frequently. A small amount of shortening or coconut oil can also help create a smoother consistency for drizzling.

How do I keep the bars soft?

Avoid overbaking them and store them in an airtight container once completely cool. Keeping them covered prevents them from drying out.

Can I freeze Butterscotch Marshmallow Bars?

Yes. Allow the bars to cool completely, cut them into portions, and wrap them tightly. Place them in a freezer-safe container or bag and freeze for up to about 2–3 months.

How should I thaw frozen bars?

Place them in the refrigerator overnight or allow them to thaw at room temperature for a few hours. For the best texture, let them reach room temperature before serving.

Can I use walnuts instead of pecans?

Absolutely. Walnuts are an excellent substitute and provide a slightly more earthy flavor.

Can I add chocolate?

Yes. Chocolate chips, chocolate chunks, or a chocolate drizzle pair beautifully with butterscotch and marshmallows.

Can I make these bars ahead of time?

Yes. These bars are excellent for making ahead. Prepare them a day before serving and keep them tightly covered at room temperature or refrigerated.

Why did my marshmallows disappear into the bars?

Marshmallows naturally melt during baking. If you want more visible marshmallow pieces on top, reserve some mini marshmallows and sprinkle them over the bars during the final few minutes of baking.

How do I get clean slices?

Let the bars cool completely, then chill them before slicing. Use a sharp knife and wipe the blade clean between cuts.

Can I make these bars in a smaller pan?

Yes, but the baking time will change. A smaller pan produces thicker bars and may require additional baking time. Watch the center carefully and avoid overbaking.

Are Butterscotch Marshmallow Bars good for holiday baking?

Yes. Their rich butterscotch flavor, chewy marshmallow texture, and optional pecan topping make them a great addition to Christmas cookie trays, Thanksgiving dessert tables, and holiday bake sales.

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Conclusion

These Butterscotch Marshmallow Bars are an easy homemade dessert packed with buttery butterscotch flavor, soft marshmallows, coconut, and crunchy nuts. Their chewy texture and rich sweetness make them a satisfying treat for both everyday snacking and special occasions.

The recipe is simple enough for beginner bakers while offering plenty of opportunities for customization. Add chocolate, peanut butter, coconut, toasted pecans, or a sprinkle of flaky sea salt to create your own favorite version.

Whether served with coffee, packed into a lunchbox, brought to a potluck, or added to a holiday dessert tray, these Butterscotch Marshmallow Bars are an easy dessert that delivers plenty of nostalgic homemade flavor in every bite.

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