Preheat your oven to 180 Fan / 200 C / 400 F / Gas 6 and line a 12 hole muffin tin with muffin cases
Whisk the milk and vinegar together in a bowl or jug then set aside
Weigh the flour, sugar, baking powder, baking soda and cacao powder into a large bowl and mix together
Stir in the chopped chocolate or chocolate chips
Whisk the oil into the milk then pour that into the bowl of dry ingredients, mixing well and making sure no flour 'pockets' remain
Evenly spoon the mixture between the muffin cases and bake for 20-25 minutes until a skewer or cocktail stick inserted into one of the muffins comes out clean
Leave to cool in the tin for 5 minutes before lifting out onto a wire rack to cool completely
While they're cooking and cooling you can make the eyes and frosting. For the eyes melt a couple of squares of vegan white chocolate and pipe small blobs onto parchment. Repeat with a square of dark chocolate, piping the 'iris' parts of the eyes in the centre of the white chocolate. Set in the fridge
For the frosting, if you're doing more than one colour (I chose orange and purple) beat the vegan butter with the icing sugar in one batch, then divide the mixture into separate bowls for however many colours your using!
Add the colouring(s), mixing them well through the frosting
When the cupcakes are completely cold spoon the frosting into piping bags fitted with a star nozzle and pipe swirls on top of each cupcake
Add the googly eyes and marvel at your witchy skills!
Store in an airtight container
Notes
Unfrosted cupcakes can be frozen
Recipe by The Cook & Him at https://thecookandhim.com/recipes/death-by-chocolate-cupcakes/