Can I make the soufflé base ahead of time?
Yes, prepare the béchamel sauce and cheese mixture up to 2 hours ahead. Separate eggs and fold whites in just before baking for best rise.
Why did my soufflé collapse?
Soufflés fall when egg whites aren't stiff enough, oven temperature drops during baking, or the dish is jostled. Keep oven door closed and bake at consistent temperature.
What's the difference between a soufflé and soufflé Suissesse?
Soufflé Suissesse is baked in a ramekin, unmolded onto a plate, and served in a cream sauce with broiled cheese on top—more luxurious than a standard cheese soufflé.
Can I use a different cheese?
Gruyère is essential for its nutty flavor and melting quality. Emmental is a close substitute, but avoid soft cheeses that won't toast properly under the broiler.
How do I know when the cream sauce is reduced enough?
Reduce until the sauce coats the back of a spoon and leaves a trail when you run your finger across it—typically 2 cups cream reduces to about 1.5 cups in 8–10 minutes.