1/2 cup butter
1/2 cup semi−sweet chocolate chips
1/3 cup sugar
1 egg
1 tsp. vanilla
3/4 cup flour
2 tbls. cocoa powder
1/2 tsp. baking powder
3 cups vanilla ice cream, slightly softened
Preheat oven to 325 degrees. Line 10x15 cookie sheet with wax paper & lightly oil paper. Melt butter and choc. chips, stir and allow to cool. Beat together sugar & egg till pale & creamy. Beat in melted choc. and vanilla. Add flour, cocoa, and baking powder. Continue beating until incorporated. Transfer batter to pan and spread evenly to edges. Bake 15 min., then remove from oven. Cool 10 min. and invert onto cutting board. Carefully remove wax paper and, using sharp unserrated knife, cut in half lengthwise. When completely cool, spread ice−cream over one half of the chocolate biscuit evenly. Top with second wafer.
Wrap in plastic wrap and freeze for at least 4 hr. Cut into 8 slices.