To ensure a good rise, make sure egg whites are at room temperature before whipping.
Do not open the oven door during baking, as this can cause the soufflé to collapse.
The soufflé can be prepared ahead of time by beating the egg whites separately and folding them in just before baking.
For a variation, substitute lemon zest and juice for orange for a Lemon Soufflé.
Store any leftover orange sauce in an airtight container in the refrigerator for up to 3 days. Reheat gently before serving.