Strawberry Sheet Cake

I have been collecting sheet cake recipes for a wedding luncheon.  There are three different cake recipes.

--Prepare a white or yellow cake mix as directed on the box. It can be
prepared in a 13x9" pan or in a jelly roll pan. (We usually do the jelly
roll pan so that it will serve more people). Once the cake has cooled
completely, mix the following:

3 cups powdered sugar
1 8 oz. package cream cheese (softened)

Mix these two together until smooth, then add one 8 oz. carton of Cool
Whip. Spread out evenly on the cake, then try to build up a small ridge
around the edge of the cake to help hold on the strawberries.

Mix up 1 package of Strawberry Danish Dessert and add fresh strawberries.
Spread carefully on top of the cream cheese layer and refrigerate.