I've been searching for a recipe for the cool whip icing that you can decorate with. Most that I've seen always say you can frost the cake and maybe startip the cake, but I've seen some in grocery stores bakeries that have been used with roses even. They're not perfect, but not too bad. I've been looking for a recipe like that for my grandmother, her birthday is in couple weeks and that is the only icing she likes.

I also have a lady that wants whipped icing. I've never messed with it. I am also curious how you decorate with whipped icing.

What you are looking for is not a recipe but a brand of product you purchase.
Rich's Bettercreme OR Frostin Pride OR (last choice) Pastry Pride.
They are available atmany cake supply shops and Gordon's Food Service (GFS).
It comes in a carton like milk - in quarts and 1/2 gal. It is fzn. but is not rock hard - it never fzs solid....just slushy.
Chill your bowl & beater then spoon out the amount of topping you need. Whip with wire whip (on KA mixer) until it peaks like whipping cream. The longer you beat it the stiffer it gets. It can be overwhipped so be careful. If it is overbeaten it will be *very!* hard to squeeze thru a bag and as it dries on the cake it will crack apart These products do not take color well - usually the lightest of pastel shades unless you airbrush it. HTH