In a large bowl, use a whisk or electric mixer to beat the cream to soft or stiff peaks, as desired (see the illustrations). If you’re sweetening it, when soft peaks form, start sprinkling in the sugar 1 tablespoon at a time.
Fold in flavorings if you like and serve immediately. Or cover and refrigerate for up to 2 hours. If it starts to separate, whisk it lightly until it comes together again.