Position a rack in the lower third of the oven. Preheat the oven to 375°F. Prepare a 9-inch or 2-quart soufflé mold.
Melt in a medium saucepan over medium heat:
Whisk in until smooth:
Cook, stirring, for 1 minute. Remove from the heat and stir in:
Return to the heat and bring just to a boil, whisking constantly. Remove from the heat. Whisk in a large bowl until slightly thickened:
Very gradually whisk in the cream mixture, then stir in:
Beat in another large bowl on medium speed until soft peaks form:
Increase the speed to high and beat until the peaks are stiff but not dry. Using a large silicone spatula, gently fold one-third of the egg whites into the egg yolk mixture, then fold in the remaining whites. Turn the batter into the prepared soufflé mold and smooth the top. Bake until the soufflé is well risen and the top is deep golden brown, 25 to 35 minutes. Serve at once with: