INGREDIENTS
•
1 stick unsalted butter, softened, plus more for greasing
•
1/2 cup packed light brown sugar
•
1/2 cup granulated sugar
•
1 large egg
•
1 teaspoon vanilla extract
•
1 1/2 cups all-purpose flour
•
1/2 teaspoon baking soda
•
1/4 teaspoon salt
•
3/4 cups semisweet chocolate chips
•
1/2 cup chopped dry roasted salted peanuts
•
12 large marshmallows
•
Two 3.5-ounce bars milk chocolate with caramel filling, broken into pieces, such as Ghirardelli Milk Chocolate and Caramel Bars