What you need:
150ml cooking oil
50g non-sweet cocoa
150g marmelade - I mixed some plum and apricot jam :)
1/4 teaspoon rum essence
10g baking powder
Preheat oven on medium heat.
Combine flour, cocoa and baking powder, stirring slightly
In another bowl mix eggs and sugar until the sugar has melted. Add the oil, jam, milk and flour composition in the end. Whisk the batter well until the flour is fully absorbed, and without bubbles.
Put about 2 tablespoons from this composition in each muffin hole. Insert the muffin pan in the oven and bake for approx. 15-20 min. After that, let them cool in the pan for 5 minutes.
I frosted half of them with white chocolate (melted with a spoon of milk and a few drops of oil), and the other half with chopped chocolate candies.
They came out super delicious and with a totally creamy touch because of the home-made plum preserve (my favourite).