Step 2
Beat the egg whites with the salt until they hold soft peaks; continue to beat, gradually adding the remaining 1/4 cup sugar, until they are very stiff but still glossy. Stir a good spoonful of them thoroughly into the egg yolk mixture to lighten it, then fold in the remaining whites, using a rubber spatula or your hand. Transfer to the prepared soufflé dish(es) and bake until the center is nearly set, 25 to 35 minutes (15 to 25 minutes for individual soufflés). Serve immediately.