Rocky Road Cake

Why I Love This Recipe
Our Iliff Grandma was the best, and this was her at her finest.
Ingredients You'll Need
Group 1:
2 c. flour
4 Tbsp. cocoa
1 3/4 c. sugar
1/4 tsp. salt
Group 2:
1 c. water
1/2 c. oil
1/2 c. oleo
Group 3:
2 eggs, beaten
1 tsp. baking soda
1/2 c. buttermilk
Group 4:
1/2 c. oleo
1/4 c. cocoa
1/3 c. buttermilk
Group 5:
powdered sugar
1/2 tsp. vanilla
1/2 c. mini marshmallows
Directions
Sift together ingredients in Group 1. In a saucepan, bring Group 2 to a boil. Pour over Group 1 and beat until smooth. Add Group 3 to the mixture and bake at 400 degrees for 16 minutes in 11"x16" pan.
Bring Group 4 to a boil in saucepan. Add Group 5 and frost cake immediately.
Alternate: Add chopped pecans to Group 5.