This homemade angel food cake is light, airy, and tastes like a slice of summer. It bakes up wonderfully high, and is much easier to make than you might think!
Preheat oven to 350 degrees F. Have an ungreased 16-cup tube pan ready.
Sift half of sugar with flour and salt. Repeat 5 times.
Beat egg whites on low until frothy, then add vanilla extract and cream of tartar. Increase to medium, adding remaining sugar 1 tablespoon at a time. Increase to medium-high and beat until stiff, glossy peaks, scraping sides and bottom of bowl once or twice as needed. Sift about ¼ cup flour mixture on top and fold gently to incorporate; repeat until all flour is used.
Spoon into tube pan, smooth the top, then run a knife through batter to break any air bubbles. Bake until skewer inserted halfway between edge and center comes out clean, about 35 to 40 minutes.
Cool upside down at least 1 hour. Run knife around edge and turn out onto serving dish; run knife around bottom and release. Place on a serving platter, slice and serve. Angel food cake is best the day it is made, but can be stored for up to 2 days at room temperature, wrapped well in plastic wrap or stored in an airtight container.