One Pan Cake Mix

In quart jar layer ingredients in this order:

2 1/2 cups All purpose flour
1/2 cup dry cocoa
1 1/2 cups sugar
2 tsp. baking soda
1/2 teaspoon salt.

Put these instructions:
Empty contents of jar into 12 x 8 baking pan. Stir until well blended. Make 3 wells in the mixture. Pour 2/3 cups oil in one. Pour 2 Tbsps. Cider vinegar (yes vinegar) in the second and 1 Tbsp vanilla in the third. Pour in 2 cups water and stir with a fork until well blended. Spread into an even layer. Bake at 350 degree oven for 35 to 40 minutes. Sprinkle with powdered sugar or frost with your favorite frosting.