First, drain the liquid from a can of chickpeas into a large bowl. Now add 1/8 teaspoon cream of tartar to that liquid, and beat it slowly with a hand mixer. Reserve the leftover chickpeas for another time.
Next, in about 30 seconds, you’ll see the aquafaba beginning to foam. Turn the speed to high and beat until stiff peaks form about 4-5 minutes. Since you’re using cream of tartar, it won’t take long to form those gorgeous, stiff peaks. Now, turn off the mixer.
Then, add the powdered sugar to your liking (1/2-3/4 cup) and one teaspoon vanilla. Now fire up your mixer again and beat until fluffy and smooth, about 1 minute. The incredibly stiff, fluffy peaks will have formed by this time, and there you have vegan whipped cream!