Rich chocolate center with gooey marshmallows between layers of cookie crumbs. Betty Crocker Lemon Bars make it easy to turn an ordinary day into something special! From the box to the oven in less than 5 minutes, these great-tasting bars will be enjoyed by your family in no time! Mississippi Mud Bars with Miniature Marshmallows Makes an 8 x 8 Pan Kosher Dairy