How To Make French Onion Soup in the Slow Cooker

How To Make French Onion Soup in the Slow CookerBy thekitchn.comPerfect French onion soup, absolutely hands-off. This is why slow cookers exist, you guys.Yield: 8 ServingsIngredients:3 pounds yellow onions, peeled, sliced, and cut into quarter-moons2 tablespoons unsalted butter, melted2 tablespoons olive oil2 teaspoons kosher salt, plus more as neededFreshly ground black pepper10 cups