Here's that recipe. I'm amazed that it stays fresh for quite some time.
Put in bowl:
2 c. flour
2 c. sugar
1 tsp. salt
Melt in pan:
1 c. margarine
4Tbsp. cocoa
1 c. water
Add to flour mixture. Then add:
2 eggs
1 c. sour cream
1 tsp. baking soda
Pour batter into greased cookie sheet. Bake at 375 degrees for 20 to 25 minutes.
Frosting
Melt in pan:
1 c. margarine
3Tbsp cocoa
6 Tbsp milk
1 tsp vanilla
1 (32-oz.) bag powdered sugar (I used about half of this and the frosting was still plenty sweet.)
Enjoy!