Ever So Soft Chocolate Cake

1 c. milk
3 T vinegar
3 c. flour
2 tsp. soda
1/2 tsp. salt
1/2 c. cocoa

3/4 c. oil
2 eggs

1 1/1 c. sugar

2 tsp. vanilla
1 c. boiling water

Add vinegar to milk to sour it.  Mix together flour, soda, salt, and cocoa.  Beat oil and eggs together; add sugar.  Beat.  Add flour mixture alternately with sour milk.  Add vanilla.  Slowly add boiling water last.  This will be a thin batter.  Pour into a well-greased and floured 12 x 16 1/2 inch sheet pan or 4 round cake pans. Bake at 325º for 25 to 30 minutes.