The time to make onion soup is best dictated by one’s pantry. As the only ‘fresh’ ingredients are cheese and onion, the biggest variable is bread. Rather than making a free choice in favor of soup, I let a stale leftover baguette decide- throw it out, make croutons, or make French onion soup.
I don’t actually measure anything in this recipe…The quantity of each ingredient can and should be regulated according to taste, with the amount of onion vs liquid the most important consideration. The onions will also cook down so you should add more than you think is necessary. Listed quantities come from Julia Child’s recipe, with the flour omitted.
• 5 cups sliced yellow onion
• at least 3T butter (as much as you’d like)
• 1 tsp sugar
• 1/2 c dry white wine
• 2 quarts beef or vegetable stock
• 1 tsp salt and pepper
• half a baguette
• 1 c Swiss or Gruyère + muenster cheese
1. Coat cast iron skillet with 1T butter. Add onions and mix around to coat onion in butter. Cover, and allow to cook untouched 15 minutes over medium heat. Check every 15-20 minutes for an hour or more, depending on heat settings. Midway through cooking, fully turn all onions, then sprinkle with sugar and add 2 T butter. Allow to continue to brown, without stirring them. Onions do not want to be your friend, and do not need to dance all the time-best to leave them alone as much as possible. Some crust on the pan (and onions!) is good, but not necessary.
2. In separate pot, heat beef (or vegetable) stock with a touch of dry white wine (you can use red wine instead-its just important that its dry else the fruitiness can be a bit obvious) and pepper.
3. With onions still cooking, deglaze pan with white wine straight from the bottle. Add stock, some pepper, then adjust to taste. The biggest caution here is to watch your wine-since I just pour some from the bottle I’ve found its very easy to end up with onions in wine-flavored water… If that happens, just allow to reduce much longer.s
4. Slice bread and toast under broiler. I use 1 or 2 for each ramekin, but more layers makes for a kind of bread pudding that is exceptionally delicious, so toast however much you like.
5. Ladle soup into ramekins. Cover with one or two slices of toast, darker side down. To layer, allow each slice to soak up liquid before placing another. Sprinkle swiss/gruyere on top, and cover with a slice of muenster cheese. Muenster melts quickly and evenly, making for an awesome gooey surface, and doesn’t have a strong flavor that will overpower your chosen cheese. If you just want to use one cheese for your soup, it should be muenster.
6. Serve with extra piece of bread. Extra ramekins can be saved for a few days, and make a fantastic breakfast.