Start with mixing the following dry ingredients - self raising flour, cocoa powder, baking powder and cinnamon. In a separate bowl combine sugar, caster sugar and vanilla extract.
Take a third bowl, put 100 g of vegan butter in it and melt it in a microwave (for about 90 seconds). Pour melted butter over a sugar mixture and chop bananas in. Take a blender and mix everything thoroughly till you see little bubbles, like in a picture below.
Once muffins are baked, let them to cool down completely. Then make 1.5 cm holes in each of them, and squeeze strawberry jam in. Cover each muffin with vegan buttercream sauce.
Get creative with decorating them. I used some sprinkles and vegan dark chocolate pieces, as well as lovely Christmas decorations that I got from TK Maxx.