French Onion Gnocchi Bake

French Onion Gnocchi Bake transforms the deep, savory flavor of classic French onion soup into a bubbling, cheesy comfort dinner. First, sweet yellow onions are slowly caramelized until golden and jammy. Then, tender potato gnocchi are folded into the rich onion sauce. Finally, everything is topped with melted Gruyère and mozzarella for a beautifully golden finish.

Although French onion soup dates back to 18th-century Paris, this baked version feels modern and effortless. Instead of toasted bread, pillowy gnocchi soak up every drop of savory goodness. As a result, each bite delivers sweet onions, buttery depth, and irresistible cheese pull.

Moreover, this recipe is surprisingly simple. While the onions require patience, the rest comes together quickly. Because everything bakes in one dish, cleanup stays minimal. Whether you’re cooking for family or entertaining friends, this French Onion Gnocchi Bake feels cozy yet elegant.

It’s hearty, rich, and completely comforting.

Recipe Yield: 4 servings

INGREDIENTS

1 lb potato gnocchi
1 cup shredded Gruyère cheese
½ cup shredded mozzarella cheese
2 tbsp grated Parmesan
½ cup dry white wine
¾ cup beef broth
½ cup heavy cream
2 tbsp unsalted butter
1 tbsp olive oil
3 large yellow onions, thinly sliced
2 cloves garlic, minced
1 tbsp fresh thyme leaves
1 tsp sugar
1 tsp salt
½ tsp black pepper

INSTRUCTIONS

1. Caramelize the onions:
In a large oven-safe skillet or baking dish, melt butter with olive oil over medium heat. Add sliced onions, sugar, salt, and pepper. Cook slowly for 25–30 minutes, stirring occasionally, until deeply golden and soft.

2. Build the flavor base:
Add garlic and thyme, then cook 30 seconds. Pour in white wine and scrape up any browned bits. Simmer 2–3 minutes until slightly reduced. Add beef broth and heavy cream, then simmer another 3–4 minutes until lightly thickened.

3. Add the gnocchi:
Stir gnocchi directly into the onion sauce. Cook for 5–6 minutes until tender and coated evenly.

4. Bake to golden perfection:
Sprinkle Gruyère, mozzarella, and Parmesan evenly over the top. Transfer to a preheated 400°F oven and bake 10–12 minutes until bubbly and golden brown.

5. Rest and serve:
Let rest 5 minutes before serving so the sauce thickens slightly. Garnish with extra thyme if desired.

Helpful Tips to Perfect This Recipe

• Low and Slow Caramelization: Cook onions gently over medium-low heat. Therefore, they develop deep sweetness without burning. The darker the golden color, the richer the flavor.
• Choose Quality Gruyère: Authentic Gruyère melts smoothly and delivers classic French onion flavor. However, pairing it with mozzarella adds stretch and balance.
• Don’t Overcook Gnocchi: Because gnocchi continue cooking in the oven, keep them slightly tender before baking. This ensures the final texture stays soft and pillowy.