# French Onion Casserole

- Servings: 1 casserole
- Prep time: 15 min
- Category: Dinner
- Difficulty: easy
- Language: en

## Ingredients

- 2 onion
- fresh thyme, finely chopped
- kosher salt
- black pepper
- beef bouillon
- heavy cream
- dijon mustard
- gruyère cheese
- butter

## Instructions

1. Peel the onions and slice them thinly using a mandoline.
2. Place onions in a large bowl, add finely chopped fresh thyme, salt, and black pepper. Mix with your hands.
3. In a small pot, whisk together beef bouillon and heavy cream. Bring to a boil, then remove from heat and whisk in a large dollop of dijon mustard.
4. After letting the onions sit for 10 minutes, use a paper towel to remove excess moisture.
5. Assemble the casserole in a baking dish by creating layers of onion, gruyère cheese, onion, and then pouring the cream mixture over the top. Add another layer of gruyère cheese and dot with butter.
6. Cover with aluminum foil and bake at 325 degrees for 45 minutes.
7. Remove the foil and bake for another 30 minutes.
8. Let the casserole sit for 5 minutes before serving.

## Equipment

- knife
- mandoline
- large bowl
- small pot
- whisk
- paper towels
- baking dish
- aluminum foil

## Tips

- Use hand protection when using a mandoline.
- Can be served as a side dish or with crackers.

## Source

- Original video: https://www.instagram.com/reel/DbtT8WLxmuw/?stkn=eWk3NXVqbXZpemdy
- Creator: Corre Larkin
- Recipe page: https://www.cliprecipe.com/recipe/73cdde0a-08bf-4d23-a2d4-332b9ec8967b
- Extracted: 2026-09-16

Extracted from the video by Clip Recipe (https://www.cliprecipe.com). Quantities and steps are as stated or shown in the video. Site guide for agents: https://www.cliprecipe.com/llms.txt