Separate the egg whites one at a time into a separate bowl before adding them to your large mixing bowl. You don’t want to risk mixing any egg yolks into the batch or this will ruin the whole batch. Slowly add the sugar into the egg whites, only add 1-2 Tablespoons of sugar at a time to make sure the sugar is getting fully dissolved into the eggs. Dip into chocolate. If desired, melt 1 cup of chocolate chips in a microwave-safe bowl in 30 second intervals, until you can stir it smooth. Dip the bottoms of the cookies into the melted chocolate. Sprinkle with crushed peppermints if desired.