Texas Sheet Cake (Hazel)

Could this be Grandma Orpha Whitlock's sister?
No pan size was mentioned but I think it is the bigger cookie sheet pan.

Combine:
2 C flour
2 C sugar
1/2 tsp. salt

Boil:
1 C water
2 cubes margarine
4 Tbsp cocoa

Add:
2 eggs
1/2 C sour cream
1 tsp. baking soda
Nuts

Bake at 400 degrees 15 to 20 minutes

Icing
Boil:
1 cube margarine
4 Tbsp cocoa
6 Tbsp milk

Add:
Powdered sugar and nuts.
Put on cake while still hot.