1/2 c. butter (butter)
1/2 c. oil
1 3/4 c. sugar
2 eggs
2 tsp. vanilla
1/2 c. sour milk
2 c. rhubarb
2 1/2 c. flour
4 tbsp. cocoa
1 tsp. baking soda
1/2 tsp. cinnamon
1/2 tsp. salt
1 tsp. baking powder
1/2 c. chocolate chips (opt.)
1 c. nuts (opt.)

Mix butter, oil and sugar, cream well. Add eggs, vanilla and sour milk; mix well. Add flour, cocoa, soda, cinnamon, salt and baking powder. Then stir in 2 cups rhubarb, add chips and nuts if you wish. Put in a 9"x13" greased and floured pan. Bake at 325 degrees for 40 to 45 minutes. Frost with chocolate frosting.