1 cup softened butter
1/2 cup superfine sugar
1-1/2 cups all purpose flour
1/2 cup cornstarch
2 ounces semi-sweet chocolate squares, melted
In large bowl, with electric mixer, beat butter and sugar until fluffy. Combine flour and cornstarch; beat into butter mixture just until mixed.
In 9 inch square baking pan, drop half of dough in small portions, scattering randomly. Combine melted chocolate with remaining dough. Drop small chocolate portions in between dough portions in pan; press top tightly to flatten.
Bake in 300o F oven for about 25 minutes or until firm to touch in center. Let cool and slice into squares or bars (may be made ahead and frozen).
Makes 36 squares