These chewy cookie bars topped with gooey marshmallows are perfect for game day, combining a rich chocolate-studded base with a sticky, sweet marshmallow layer.
Do not overmix the batter to keep bars chewy. Add marshmallows near the end of baking to keep them gooey and golden. Cool bars completely before slicing to prevent marshmallow sticking. Optional add-ins include 1 cup chopped toasted pecans or walnuts. For dairy-free, use plant-based butter and dairy-free chocolate chips. For gluten-free, substitute all-purpose flour with gluten-free flour blend.
Keywords: cookie bars, chewy cookie bars, marshmallow topping, game day dessert, chocolate chip cookie bars, easy cookie bars, chewy cookies