1/2 C. Crisco shortening. (not butter flavor)

2 Egg Whites.

1/2 tsp Salt

3 1/2 C. Powdered Sugar

1 tsp Vanilla extract 

Beat egg whites until stiff and peaking. Add salt and 1/2 of the powdered sugar.

Cream the shortening and the other half of powdered sugar and the vanilla extract.

Combine the two and mix until fluffy. 

I added about 2 T of water to thin out to spread easier.

This batch just barely covers a 9x13 cake out of the pan. Might have to go thin to make it. If doing any decorating on it, make 2 batches from the start. 

Recipe Courtesy Of:

Internet.