This incredibly creamy instant pot macaroni and cheese is surprisingly fast and easy to cook in a pressure cooker. Aside from needing very little attention, there are no boil-over messes to worry about. For this delicious mac and cheese, there's no separate sauce to make and no baking required. Of course, if you like a crunchy breadcrumb topping, spoon the cooked macaroni and cheese into a baking dish, top it with buttered breadcrumbs, and stick it under the broiler for a few minutes.