This recipe is a modification of one from a cooking book concerning only chocolate recipes :)
We changed a few things and tried it yesterday, here the technical data.
Final units: around 14-15 muffins
Preparation time: around 15 min
Baking time: around 20 min at 175°-200°C in a modern air oven, preheated at 200°C
25g powder cacao
1 little envelope of chemical baking powder
1 little spoon of cinnamon
120g brown sugar
50g black chocolate (around 70% of cacao)
100ml sunflower oil
mix well the oil with the eggs, then add slowly the milk to the resulting mixture of the eggs and oil, mixing well those ingredients.
put the flour, the cacao powder, the baking power, the cinnamon and the brown sugar and mix them together with a spoon or wooden instrument. When the powder-like mixture is more or less homogeneous, add the dark chocolate in small pieces and distribute it in the mixture.
Add the liquid mixture of recipient A into the solid powder-like mixture of recipient B, mixing it slightly with the spoon or wooden instrument. Do not mix too much to avoid that the muffins become too hard in the oven.
Distribute the mixture in the muffin forms and put them into the oven.
Back until they are dry inside (puncture one with a long needle or a fork to check it).