Wacky cake

Preheat oven to 350°F (175°C). Grease and flour a 9-inch round cake pan or 8x8-inch square baking dish.

Combine flour, sugar, cocoa, baking soda, and salt in the prepared baking pan, mixing together with a fork until evenly distributed.

Make three shallow wells in the dry mixture and pour vinegar into one well, vanilla extract into another, and salad oil into the third.

Pour water over the entire mixture and stir vigorously with a fork until just combined and smooth, about 1 minute—the batter will be thin.

Bake in the preheated oven for 28-30 minutes, or until a toothpick inserted in the center comes out clean.

Remove from oven and let cool in the pan for 10-15 minutes, then turn out onto a wire rack to cool completely.

Dust the cooled cake with powdered sugar, or mix powdered sugar with a small amount of water to make a thin glaze and drizzle over the top.