For cupcakes mix dry ingredients, in a bowl flour, granulated sugar, cocoa powder, baking soda, and salt and pass this mixture through a strainer so that lumps will not be formed.
Now add mix ingredients, add ½ cup vegetable oil, 1 whole egg, ¾ tsp vanilla extract, ½ cup our home-made buttermilk and whisk everything well.
Combine wet and dry ingredients and add ½ cup warm water gradually and mix well to form a thin batter.
Now pour that mixture in a pre-lined muffin tray and bake for 18-20 minutes at 300F.
Now add black and green color to the buttercream frosting until you get your desired color shade and pour that frosting into a piping bag with a grass tip.
For decoration, you will need harvest candy corn, oreo cookies, big marshmallows, and a toothpick. Insert toothpicks into the marshmallows and place it on the top of the muffin upside down to make the wizard head and with fondant make eyes and nose.
Now make hairs of the wizard with buttercream frosting and then with oreo cookies make wizard hat, and then at the top again squeeze some icing and then top with candy corn to make the top of the hat, Serve and enjoy it.