Place a large metal bowl and the beater for your mixer in the freezer for at least 20 minutes. Using a small paring knife, split the vanilla bean lengthwise. Use the tip of the knife to scrape the seeds from both sides of the bean. (Do not throw away the pods! They can be used to make extract or flavored sugars.)
In a large mixing bowl, combine the cream, vanilla seeds and powdered sugar. Set your mixer to medium (with the whisk attachment for a kitchenaid, or regular beaters for a standard mixer) and whip the cream just until peaks form. If you whisk it too long, the mixture will turn to butter (with this recipe, you'd be left with a strange sweet vanilla butter, but butter nonetheless). Serve immediately. Enjoy!