Only really tasty with a little oil

I liken this Multaben chocolate nut cream with the chocolate shake is Multaben which delicious.
When preparing the cream according to instructions, it lacks flavor, the chocolate shake tastes much better since.
However, when low-fat milk and a vegetable oil TL (2g) used
the picture changes dramatically.
The cream tastes then like Nutella or Nusspli.
The cream is also nice and firm, so that they can spoons.
This consumption takes longer and the saturation is stronger.
As a normal product I give 4 stars with bias to 3 stars,
with a little walnut oil I give it 5 stars.