Wet ingredients:
2 tbsp ground chia seeds (or sub for non ground)
230ml / 8.1fl.oz plant-based milk
1/2 tbsp apple cider vinegar
2 tsp vanilla extract
4 tbsp coconut oil, plus extra for greasing

Dry ingredients:
120g / 4.2oz plain flour
80g / 2.8oz light brown sugar
1/2 tsp baking soda
1/2 tsp baking powder
70g / 2.5oz Cocoa powder
pinch of salt

To decorate:
160g / 5.6oz icing sugar
3 tbsp cocoa powder
3 tbsp planet-based milk
1 tsp vanilla extract
vegan sprinkles (optional)