The biting cold of winter requires major comfort foods to indulge in, and French onion soup is at the top of our list. While we love a big bowl of soup, turning it into a cheesy casserole is a no-brainer. It’s super easy and delivers huge on flavour. The combination of rich, caramelized onions, gooey melted cheese and toasted baguette packed with the deep flavour of French onion soup will leave you weak in the knees and totally satisfied.

onion soup casserole

Prep: 15 minutes
Total: 1 hour 15 minutes
Serves: 6

Ingredients:
3 Tbsp unsalted butter
4 cups sliced Spanish onion
1 tsp salt
2 Tbsp Madeira wine
2 1/2 cups beef stock
1 Tbsp Worcestershire sauce
1 tsp black pepper
2 sprigs fresh thyme
6-8 1 inch slices of French baguette, toasted
1 cup of Gruyere cheese, shredded
1/2 cup Parmesan cheese, shredded
1 Tbsp butter, melted

Directions:
1. Heat butter in a large pan over medium. Once butter is bubbly and foaming, add the onions and salt. Stir onions to coat in butter and let cook until deep brown and caramelized, about 30-40 minutes, stirring intermittently.
2. Once onions have caramelized, pour in Madeira wine, stir and continue to cook until alcohol is evaporated and liquid is fully absorbed into onions, about 1 minute.
3. Preheat oven to 400°F. Add beef stock, Worcestershire sauce, black pepper and thyme. Increase heat to medium and cook until stock reduces by about 1/3, about 5 minutes.
4. Pour contents of pan into a medium-size casserole dish. Remove thyme sprigs. Arrange toasted baguette slices over onion mixture and press down allowing the bread to absorb the liquid. Sprinkle with cheese and drizzle with melted butter.
5. Bake in oven until cheese is melted and golden, about 30 minutes. Serve immediately.

Looking for more comforting dishes? Try Ina Garten’s Most Comforting Casseroles.