In a large bowl, combine flour, sugar, cocoa powder, salt and baking powder. whisk till combined.
Add vinegar, vanilla, oil and water. Mix till combined.
For into a greased 8x8 pan and bake in a pre-heated 350 oven for 30-35 minutes or until a toothpick comes out clean.
Top with powdered sugar or frosting. Serve with whipped cream or ice cream Bon Appetit.