White Frosting

Directions

1. 1
   Whisk the egg whites, sugar and salt in a heatproof bowl set over a saucepan of simmering water (do not let the bowl touch the water) until the mixture is warm and the sugar dissolves.
2. 2
   Remove the bowl from the pan; let cool slightly.
3. 3
   Beat the egg white mixture in a stand mixer fitted with the whisk attachment (or with a hand mixer) on medium-high speed until stiff peaks form, 12 to 15 minutes.
4. 4
   Beat in the butter a few pieces at a time, then continue beating until smooth.
5. 5
   (Don't worry if the mixture looks separated at first-it will come together as you keep beating.)
6. 6
   To color the icing, divide into two 1-cup portions and follow these instructions.
7. 7
   Photograph by Levi Brown