Preheat oven to 180C / 350F. Grease a 9" baking pan or bundt pan with butter and set aside
Mix the dry ingredients together with a whisk - flour, cocoa powder, salt, baking powder, baking soda and sugar - ensuring there are no lumps
In a separate bowl, whisk together the vinegar, oil, vanilla, and water
Pour the wet ingredients into the dry mixture and mix gently until just combined and there are no lumps. Do not over-mix the batter
Pour into the greased pan and bake in the pre-heated oven for 35 minutes or a skewer inserted into the cake comes out clean
Cool completely before slicing. You can also frost this cake for a special occasion
Notes
The batter will be a bit runny, this is normal
Use good quality cocoa powder
You can use regular white vinegar instead of apple cider vinegar
You can use plain all-purpose flour, whole wheat flour, or spelt flour in chocolate cake recipe. The texture may change a little based on the flour used