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4.91 from 11 votes

Marshmallow Butterscotch Blondies

These Marshmallow Butterscotch Blondies have a super yummy flavor combination! They're buttery and rich with the perfect amount of marshmallow chewiness, while the butterscotch morsels provide a unique flavor that is sure to make these a family favorite!
Prep Time15 minutes
Cook Time45 minutes
Total Time1 hour
Course: Dessert
Cuisine: American
Keyword: blondies, cookie bars, marshmallow, butterscotch
Servings: 16 servings
Calories: 282kcal
Author: MaryAnn Dwyer

Ingredients

  • 2 cups all-purpose flour
  • 3/4 tsp. baking powder
  • 1/4 tsp. baking soda
  • 1/2 tsp. kosher salt
  • 3/4 cup (1 1/2 sticks) unsalted butter
  • 1 cup light brown sugar, firmly packed
  • 1/2 cup granulated sugar
  • 2 large eggs
  • 2 tsp. vanilla extract
  • 1 cup butterscotch morsels, plus a bit extra for sprinkling on top
  • 15 large marshmallows, sliced in half

Instructions

  • Preheat oven to 350 degrees. Spray an 8x8 baking pan with nonstick cooking spray. Set aside.
    In a medium bowl, whisk together flour, baking powder, baking soda and salt. Set aside. In the bowl of a stand mixer fitted with a paddle attachment, cream the butter and both sugars on medium-high speed until light and fluffy. Turn the mixer to low and add the eggs, one at a time until well combined. Add the vanilla and continue to mix until incorporated. Slowly add the dry ingredients to the wet ingredients and mix just until combined. Fold in the butterscotch morsels and halved marshmallows until well combined.
  • Press the blondie batter evenly into the prepared pan. Bake until the edges are set and the top is lightly browned, about 45 minutes. Let the bars totally cool before cutting into squares.

Notes

I use large marshmallows that I slice in half for this recipe. You can substitute 1 1/2 cups mini marshmallows.
You can cut the bars into as many squares as you prefer. They're rich, so I like to cut mine into 16 squares.