Step-by-Step Instructions:
Preheat the oven to 375°F (190°C). Butter and sugar the insides of soufflé dishes.
- Beat egg whites to stiff peaks, gradually adding sugar.
- In a separate bowl, mix egg yolks with melted chocolate and Grand Marnier.
- Gently fold in the egg whites into the chocolate mixture.
- Pour into the prepared dishes, leaving room at the top.
- Bake for 15-20 minutes until risen and set on the outside but still slightly soft in the center.
- Dust with powdered sugar and serve immediately.