This recipe shared by Joyce Adams.

Ingredients:
1 6-ounce package (1 cup) semi-sweet chocolate pieces
2 egg whites
1/8 teaspoon salt
½ cup granulated sugar
½ teaspoon vanilla
½ teaspoon vinegar
¾ cup chopped nuts (English walnuts work well in this
recipe)

Directions:
Melt chocolate in bowl and set aside. In a separate bowl, add the salt to the egg whites and beat until foamy. Gradually add sugar; beat until stiff peaks form. Beat in vanilla and vinegar. Fold in melted chocolate and nuts. Drop by teaspoonfuls onto greased cookie sheet. Bake at 350 degrees for 10 minutes. Remove immediately.
Makes three dozen puffs of chocolate meringue cookies.