Crockpot cooking is also handy if you going to be out all day because you can leave your French onion soup recipe, or whichever recipe you are making, to cook by itself. To make the best crockpot soup recipes, it is important to follow the recipe closely. With a lot of crockpot recipes, you simply throw everything in, stir it, and leave it, but if there are any other steps, it is important to do them.