3 egg whites
1/8 teaspoon cream of tartar
1/2 teaspoon vanilla extract
2/3 cup white sugar
1 tablespoon unsweetened cocoa powder
1/3 cup semisweet chocolate chips
Preheat oven to 300 degrees F (150 degrees C).
Combine egg whites, cream of tartar, and vanilla. Beat until the whites form soft peaks. Slowly add sugar; beat until stiff peaks form, and mixture becomes glossy. Fold in cocoa and chocolate chips.
Drop mixture by teaspoonfuls on to a greased cookie sheet. Bake for 25 to 30 minutes.