This slow cooker French onion soup is so easy & simple. Toss everything into the slow cooker, throw the topping together 5 minutes before serving and you're done. OK, maybe 10 minutes if you add in the time it takes to wrangle your family to the table, but you can do this.
I added a little coconut sugar to my soup to add a little depth of flavor, but you can use plain sugar, brown sugar or just omit it all together.
Do not, I repeat, do not use cooking wine for this recipe. In fact, just don't buy that stuff. Ever. K? K. If you wouldn't drink it, don't cook with it. I love a dry red wine for this recipe. A little in the pot, a little for the cook. You can substitute more beef stock for the wine if you prefer not to cook with alcohol.
My recipe calls for 4 cloves of garlic, but you measure that with your heart.
If you don't have the patience to pluck off 2 tbsp of fresh thyme leaves, toss in an entire sprig and walk away. You can fish out the stems at the end of the cooking time.