For the chocolate dough, mix all the dry ingredients in a bowl. Add canola oil and vegetable drink and stir only until all ingredients are just mixed.
Place paper molds in the hollows of a muffin baking sheet and fill about halfway with the batter.
Bake mini muffins for 10 minutes. If you make normal sized muffins, the baking time will increase by about 5 minutes. At the end of the baking time, prick one of the muffins with a wooden stick, pull it out again and if no dough sticks to the stick, the muffins are ready.
Remove the muffins from the baking tray and place on a wire rack to cool well.
For the buttercream, beat the peanut butter and plant-based butter for 3-4 minutes with the mixer.
Sift the powdered sugar, gradually add to the peanut buttercream and stir well.
If you want a firmer cream, add a little more powdered sugar.
Finally, put the buttercream in a piping nozzle and decorate the cooled chocolate muffins with it.
It's best to put the finished cupcakes in the fridge and take them out a few minutes before they're eaten.
Notes
If you prefer larger cupcakes increase baking time and you will get about 20 pieces.