Preheat oven to 350 degrees.

Sift together the flour, baking soda, and salt. Pour into an ungreased 8x8-inch baking pan. Add in the unsweetened cocoa powder and sugar. With a fork, mix the ingredients well and spread evenly in pan, making 2 small holes and 1 large hole in the mixture.

Pour the apple cider vinegar and vanilla extract into small holes, and vegetable oil into large hole.

Pour the 1 cup of water over everything. Using a fork, mix everything together until blended.

Bake for 30 minutes, or until a toothpick inserted in the middle comes out clean.

To make whipped cream, in a stand mixer, whip the cream for 2-3 minutes until thick. Add in the powdered sugar and vanilla; gently mix.

Cut the cake into square pieces and add a dab of whipped cream on top!