Slow Cooker French Onion Soup (With Video) Edit Slow Cooker French Onion Soup is ridiculously easy to make. It is incredibly flavorful and you can top it with as much cheese as you want!Click here for Recipe» Share this post Related PostsFully Loaded Cheesy Breakfast Casserole (With VIDEO)Bite-Size Cheesy Pepperoni Pizza Puffs (VIDEO)Ravioli and Sausage Skillet (VIDEO)3-Ingredient Brownies (With VIDEO)