Soft, chewy chocolate cookies with pockets of gooey marshmallow swirled throughout, perfect for any occasion.
Ensure all cold ingredients like butter and eggs are at room temperature for best results.
Do not skip the dough chilling step; it prevents spreading and improves texture.
Avoid overmixing the dough once flour is added to keep cookies tender.
Cookies will look slightly underbaked in the center; they will set as they cool.