Old Favorite - "No Bowl Cake"

This is a tuned up version of the favorite easy cake mom used to make.
Oven 350 for 30 minutes.

Cake:

Dry Ingredients:
1 1/2 Cups flour
1 Cup sugar
3 TB cocoa powder
1/2 tsp. salt or 1 tsp kosher salt
1 tsp. baking soda

Wet:
5 TB melted butter
1 Cup cold water
1 tsp. vanilla extract
1 TB white vinegar

Preheat oven to 350°. Combine all of the dry ingredients in an un-greased 8x8-inch square cake pan.

Put into one corner melted butter, into the second corner water and vanilla, and in the third corner you put the vinegar.

Stir everything and blend it well. Bake at 350° for about 30 minutes or until the cake shrinks a little from the sides. Let the cake cool, and then frost.