Cloud Puffs

* 3 egg whites, at room temperature
 * 12 teaspoons of sugar substitute 
* 1/2 teaspoon cream of tartar
 * 1 teaspoon vanilla 

Preheat oven to 200 degrees. Put egg white and cream of tartar in a bowl.
 Beat with an electric mixer. Add sugar a little at a time, whipping well in between.
 Add vanilla and continue whipping until whites are very stiff. This may take several minutes.
 Place heaping spoonfuls of the mixture on a cookie sheet.
 Bake in a 200 degree oven for 75 minutes. 
Turn oven off and let cookies sit in oven for 2 more hours.
 Remove from oven and store cookies in an airtight container.