August 8th, 2011
By LeeAnne Wright
Combine sugar, salt and egg whites and beat until slightly thickened and foamy (like shaving cream consistency), about 5 minutes.
Add butter, 1 piece at a time, until smooth.
Add cooled melted chocolate and vanilla extract; mix until combined. Beat until light, fluffy and thoroughly combined, scraping beater and sides of bowl with spatula as needed.