Place the sugar, the vanilla sugar and the melted butter in a large bowl and mix together.

Add the flour and the baking powder and mix again.

Add the 2 eggs and the milk, and mix together.

Peel the apples, cut into small chunks and add them to the rest of the ingredients. Mix together.

Fill the muffin moulds.

Bake at 280° for 25 mins.

Take the muffins out of the mould.

Using a knife, cut off the top of the muffins and add a teaspoon (15g) of Nutella per muffin with a piping bag.