Traditionally, caramelized onions are cooked with lots of oil and butter, sometimes even sugar. hey, that's what makes them sinfully delicious, right? i have discovered a way to make these onions without any of that, and they taste exactly the same. use these butter-less caramelized onions on burgers, alongside steak, on top of chicken, on sandwiches, to up the flavor profile of your favorite foods, without a ton of calories.