Step 14: Add Sugar and Beat Until Peaks Appear
Gradually add 1/2 cup of sugar to egg whites and continue to beat.
Add a pinch of salt.
Beat for several minutes, until mixture turns white and stiff peaks appear.
How to Check if Your Egg Whites Are Done:
You will need to beat your egg whites and sugar for a while. The mixture will gradually turn bright white and expand as air enters the mixture. Stop mixing and lift your beaters. If little mountains appear in the bowl you are finished. If you want, you can touch them. They should be surprisingly stiff.
It may seem like this part takes forever, but remember, you can still over-beat the eggs, so you will want to occasionally stop and lift your beaters up to check for peaks.