GPT4 response:

Here is a basic recipe for making a cheese soufflé:

Ingredients:

- 1/2 cup unsalted butter, plus more for greasing
- 1/2 cup all-purpose flour, plus more for dusting
- 2 cups whole milk
- 1/4 teaspoon cream of tartar
- 8 large egg whites
- 6 large egg yolks
- 2 cups shredded Gruyère cheese
- Salt and freshly ground black pepper
- 2 teaspoons Dijon mustard (optional)

Steps:

1. Begin by preheating your oven to 375 degrees F (190 degrees C).

2. Prepare your soufflé dish. Grease it with butter then dust it with flour.

3. In a medium-sized saucepan, melt 1/2 cup of butter over medium heat. Stir in the 1/2 cup of flour until the mixture is blended and bubbly.

4. Gradually whisk in the milk until the mixture is smooth. Cook it, whisking constantly, until it's thickened and comes to a boil, around 2-3 minutes. Remove the pan from the heat.

5. Meanwhile, in a separate large bowl, beat the egg whites and cream of tartar together on high speed until they form stiff peaks.

6. Go back to your saucepan and whisk in the egg yolks one by one. After that, whisk in the shredded cheese, salt, pepper, and mustard.

7. Carefully fold about a quarter of the beaten egg whites into the cheese mixture to lighten it. Then fold in the rest of the egg whites until no white streaks remain.

8. Pour the mixture into your prepared dish. Bake it in the preheated oven until it's puffed and golden brown on top, which should be about 25-30 minutes.

9. Serve immediately. Soufflés can deflate quickly, so make sure they are served right out of the oven.

Enjoy your homemade cheese soufflé! You can experiment with different types of cheese or other ingredients to add in for more variety.

Please note: The inside of a perfectly baked soufflé should still be slightly runny. If you prefer a fully set center, bake it for a bit longer.