Icebox muffins are the simple, cool (actually) dessert you want to add to your summer season repertoire. “In its easiest kind, an icebox cake is a layered dessert of crispy cookies and fluffy whipped cream,” cookbook creator Jessie Sheehan wrote for The Washington Put up. “However it’s one which transforms into one thing actually magical and sophisticated when positioned within the fridge to agency up, because the cookies take in the cream, softening into one thing downright caky and luscious.”