3 cups salted peanuts
2 cups peanut butter chips
2 cups mini marshmallows
1 (14 oz.) can sweetened condensed milk
3 tablespoons unsalted butter
1/2 teaspoon vanilla extract
Melt butter and peanut butter chips in a large saucepan over medium heat until smooth, then stir in condensed milk, vanilla extract and marshmallows, stirring until smooth and incorporated.
Generously grease a 9×13-inch baking dish with butter or non-stick spray, or line with parchment paper, then spread half of peanuts across baking dish.
Pour condensed milk mixture over peanuts, then sprinkle remaining peanuts on top.