Preheat oven to 350 degrees. Line 2 cookie sheets with foil. Beat egg whites with an electric blender until white peaks form. Add sugar, 1 teaspoon at a time. Stir in vanilla and salt and beat mixture until the whites are stiff and shiny. Fold in chocolate chips. Drop mixture by teaspoons onto the cookies sheets.
Turn off the oven and place the cookies inside. Leave them in the oven for a few hours or overnight. The cookies will be ready to eat when you open the oven.
Makes 2 dozen.
