Slow-Cooker French Onion Soup

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You can't caramelize onions for French onion soup without constant stirring. Or can you?

SERVES6 to 8

TIME10 to 12 hours on high

SEASON 5
has video

WHY THIS RECIPE WORKS

Soy sauce, sherry, and thyme added early on helped boost flavor of our Slow-Cooker French Onion Soup recipe, but the addition of beef bones reproduced the rich meatiness of the classic. We microwaved the bones for a few minutes before placi...