what is the difference between a jelly roll pan and a cookie sheet?
A jelly roll pan (typically 10½ by 15½ inches) is simply a smaller version of a rimmed baking sheet (about 12 by 18 inches). When it comes to equipping your kitchen, baking sheets are more versatile. You can use one to roast a large batch of vegetables, bake a dozen or more cookies, or even make a large sheet cake.