See below ingredients and instructions of the recipe
1 c Butter, softened
1/2 c Fine granulated sugar
1 3/4 c All-purpose flour
1/4 c Rice flour
1 pk Semi-sweet chocolate chips
Cream butter and sugar using electric mixer until light and fluffy.
Stir in remaining ingredients. Spread into bottom of 13x9-inch
ungreased pan. Bake at 275F (140C) for 45 minutes or until lightly
golden around edges. Cut into bars. Cool.
Source: Chipits ad, Chatelaine magazine, December 1993, page 119