Instructions: 1/2 Tsp. cream of tartar
Beat butter, confectioners sugar, 1/2-cup granular sugar and salt in bowl until well blended. Add egg and vanilla. Beat until light and fluffy. Stir sifted flour, soda and cream of tartar into creamed mixture. Chill about two hours. Shape into 1-inch balls; place two inches apart on ungreased cookie sheet. Press to flatten with glass buttered on bottom and dipped in 1/4-cup granular sugar. Rebutter if necessary and dip in sugar each time. Bake in a preheated 350 oven 10 to 12 minutes or until light brown on edge. When cookies are cool, melt chocolate chips in small, heavy-duty saucepan over lowest heat possible; stir. When chips begin to melt, remove from heat, stir. Return to heat for a few seconds at a time, stirring until smooth, then pile icing on cookies. (Note: Do not make cookies on a damp, rainy day because it takes to long for icing to set)

Makes about 4 1/2 dozen.

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