Wartime eggless chocolate cake

CHOCOLATE CAKE

1 tsp. Soda
1 1/2 C Flour
1 C Sugar
6 Tbsp Cocoa (as in Hershey's powdered cocoa)
1/2 tsp. Salt
1 C Cold Water (NOT iced water)
1 tsp. Vanilla
6 Tbsp Oil
1 Tbsp Vinegar (yes, you are reading correctly)

Place all ingredients in bowl & mix. Pour into lightly greased & floured 9 X 9 X 2 pan.
Bake 375 for 25-30 minutes. COOL IN PAN.

Notes:
THIS CAKE DOES NOT HAVE EGGS in the recipe and DO NOT ADD them!
This was a recipe I made often at sea level---when I moved to Colorado, I had to add more water or the cake was dry.
I often DOUBLED the recipe without any problem for a full sheet pan. I never made this as a layered cake.