S.G.
I've always used the recipe on the bag of Toll House Chocolate Chip morsels. At the bottom of the recipe it explains how to make the chocolate chip cookies into bars, only I usually bake it about five minutes less than the recipe says because it gets so hard around the edges if I bake it longer. Just made them for my husband for his birthday this past week, they turned out great. And here is my grandma's recipe for whipped icing. She uses it to make cream filled cupcakes. It is great squeezed into chocolate cupcakes, but works good as cake icing too. Hope this helps!
5 Tbsp. flour
1 cup milk
Cook this mixture over low heat until very thick, stirring constantly. Let this mixture cool, then add:
1 cup granulated sugar
1 cup shortening (like Crisco)
1 tsp. vanilla
Beat with mixer until smooth.
Add any color food coloring for different colored icings.