Blueberry and white chocolate Mug cake

Ingredients
4 tablespoons all-purpose flour
1 egg yolk
1 tablespoon dried blueberries
60 GR White Chocolate
1 tablespoons brown sugar
Vanilla Aroma
A pinch of baking powder
A teaspoon of sunflower oil
Preparation
We start by melting the butter for 20 seconds in the microwave. Then in a bowl sift the flour using a strainer or releasing hand in the form of rain. We also add the sugar and baking powder. We mixed it all up and booked it. In another bowl we beat the egg yolk and add the aroma of vanilla and dried blueberries.
With the help of a grater grate 50 gr of white chocolate and keep 10 grams in pieces to put them over.
In the cup where we go to put the mixture before we will put a teaspoon of sunflower oil we extend it throughout the cup. This way it will be harder to stick our mug cake. Add the mixture to the cup and microwave. 1 minute at about 800 watts. Then leave it inside the microphone for two more minutes to rest.