- 3 large eggs
- 1/2 cup whole milk
- 1/2 cup flour
- 1/2 tsp. kosher salt
- pepper
- 3/4 cup grated Gruyere cheese
- 3 tbsp. unsalted butter
- Heat oven to 400 degrees
- Whisk together eggs, milk, flour, salt and pepper
- Stir in cheese
- In 9-inch ovenproof skillet, melt butter
- Pour in batter
- Transfer to oven
- Bake until puffed and dark golden, about 30 minutes