French Onion Soup Gratinée

Why go out when you can have it in? This slow cooker French onion soup is a breeze to make, and even better than the restaurant version you know and love.

Serves: 10Hands-on: 15 minutesTotal: 7 hours 15 minutesDifficulty: Easy

Serves: 10


  • 3 large sweet onions, peeled and sliced
  • 2 1⁄2 Tbsp. minced garlic
  • 1⁄3 cup butter, melted
  • 1 Tbsp. balsamic vinegar
  • 3 Tbsp. all-purpose flour
  • 8 oz. red wine
  • 64 oz. beef stock
  • 1 tsp. salt
  • 1⁄2 tsp. ground black pepper
  • 10 thick slices French bread, toasted
  • 10 slices provolone cheese


  • Place onions, garlic, butter, and vinegar in a 4- or 6-quart slow cooker and stir until well combined.
  • Cover cook for 1 hour on high, stirring occasionally, until onions lightly browned and aromatic. Add flour, stirring to combine.
  • After 10 minutes, pour in wine, beef stock, salt, and pepper. Reduce heat to low and cook for 6 hours.
  • When ready to serve, fill individual soup bowls with soup and place a slice of French bread onto each. Top with cheese. Broil for 2 to 3 minutes, or until cheese is golden and bubbling. Serve hot.