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To prepare the cheese base: Melt 35g of butter in a saucepan over medium heat.

Add 35g of flour to the melted butter and cook for a few minutes, continuously whisking, to form a roux.

Gradually add 200g of milk to the roux, whisking constantly to prevent lumps. Bring the mixture to a boil.

Simmer the mixture for 2 minutes, continuing to whisk.

Stir in 80g of double cream. Grate in about 1/4 teaspoon of nutmeg, then add 200g of Gruyere cheese, 1/4 teaspoon of salt, and 1/8 teaspoon of black pepper. Stir until the cheese is melted and fully incorporated.

Transfer the warm cheese base mixture into a blender. Add 6 egg yolks and blend until the mixture is completely smooth. Set aside (this yields 8 portions of base; you will use 210g for 4 soufflé portions).

Preheat your oven to 150°C (300°F). Prepare your soufflé moulds by brushing them generously with soft butter and then dusting them lightly with flour, tapping out any excess.

Pour 200g of egg whites into a clean stand mixer bowl. Add a little lemon juice (about 1/4 teaspoon). Whisk the egg whites on high speed until they form stiff peaks.

Take 210g of the warm cheese base and gently fold in the whisked egg whites in two additions until just combined. Be careful not to deflate the egg whites.

Spoon the soufflé mixture into the prepared moulds, filling them about two-thirds full. Place the soufflé moulds in a bain marie (a larger baking dish with hot water around the moulds).

Bake in the preheated oven at 150°C for 16-20 minutes, or longer if using bigger moulds, until the soufflés are puffed and golden.

While the soufflés are baking, prepare the cheese and leek sauce. Chop 1 leek into small diced pieces and mince 1 garlic clove.

Melt 50g of butter in a saucepan over medium heat. Add the chopped leeks and minced garlic. Sweat them in the butter until they are soft, about 5-7 minutes.

Season the softened leeks and garlic with 1/4 teaspoon of salt and 1/8 teaspoon of black pepper. Pour in 200g of double cream and add 80g of Gruyere cheese.

Stir the sauce continuously until the cheese has melted and the sauce has thickened slightly. Keep warm.

Once baked, carefully remove the soufflés from the oven. Invert them onto a serving tray or individual plates. Cover the top of the soufflé generously with grated Parmesan cheese.

Pour the warm cheese and leek sauce over your cooked soufflés. Increase oven temperature to 200°C (400°F). Place the sauced soufflés back into the oven for about 5 minutes, or until gratinated all over.

Garnish with chopped chives if desired and serve immediately.


To prepare the cheese base: Melt 35g of butter in a saucepan over medium heat.

Add 35g of flour to the melted butter and cook for a few minutes, continuously whisking, to form a roux.

Gradually add 200g of milk to the roux, whisking constantly to prevent lumps. Bring the mixture to a boil.

Simmer the mixture for 2 minutes, continuing to whisk.

Stir in 80g of double cream. Grate in about 1/4 teaspoon of nutmeg, then add 200g of Gruyere cheese, 1/4 teaspoon of salt, and 1/8 teaspoon of black pepper. Stir until the cheese is melted and fully incorporated.

Transfer the warm cheese base mixture into a blender. Add 6 egg yolks and blend until the mixture is completely smooth. Set aside (this yields 8 portions of base; you will use 210g for 4 soufflé portions).

Preheat your oven to 150°C (300°F). Prepare your soufflé moulds by brushing them generously with soft butter and then dusting them lightly with flour, tapping out any excess.

Pour 200g of egg whites into a clean stand mixer bowl. Add a little lemon juice (about 1/4 teaspoon). Whisk the egg whites on high speed until they form stiff peaks.

Take 210g of the warm cheese base and gently fold in the whisked egg whites in two additions until just combined. Be careful not to deflate the egg whites.

Spoon the soufflé mixture into the prepared moulds, filling them about two-thirds full. Place the soufflé moulds in a bain marie (a larger baking dish with hot water around the moulds).

Bake in the preheated oven at 150°C for 16-20 minutes, or longer if using bigger moulds, until the soufflés are puffed and golden.

While the soufflés are baking, prepare the cheese and leek sauce. Chop 1 leek into small diced pieces and mince 1 garlic clove.

Melt 50g of butter in a saucepan over medium heat. Add the chopped leeks and minced garlic. Sweat them in the butter until they are soft, about 5-7 minutes.

Season the softened leeks and garlic with 1/4 teaspoon of salt and 1/8 teaspoon of black pepper. Pour in 200g of double cream and add 80g of Gruyere cheese.

Stir the sauce continuously until the cheese has melted and the sauce has thickened slightly. Keep warm.

Once baked, carefully remove the soufflés from the oven. Invert them onto a serving tray or individual plates. Cover the top of the soufflé generously with grated Parmesan cheese.

Pour the warm cheese and leek sauce over your cooked soufflés. Increase oven temperature to 200°C (400°F). Place the sauced soufflés back into the oven for about 5 minutes, or until gratinated all over.

Garnish with chopped chives if desired and serve immediately.
