Slow Cooker French Onion Soup This is wonderful. Better than some restaurants. Flavors blend very well together. I followed the recipe word for word. I will probably use more onions next time as I love love love carmelized onions. I was so anxious to try this recipe I cooked it on the stove. I just could not wait. Next time I will be patient and do it in the slow cooker. Either way you make it it is a winner. I will be serving this quite often this winter.