Butter (curd) cheese beat with a mixer to become plastic.

Add sugar...

I have sugar "Mistral small".

And pour in the rum and whisk.

White chocolate to melt (in a water bath or in microwave), pour into the mixture, stir again.

Hazelnuts, chop roughly and add to the mass, stir.

A lot to cover with cling film and leave in the fridge for a couple of hours, so she slightly froze. So it will be easier to work with it.

To prepare the curd mass, which spent a couple hours in the fridge in a separate bowl, prepare the water to wet the hands and one with cocoa powder. It should NOT be sweet.

With wet hands or using a spoon to take a little bit of curd mass, make a ball the size of a walnut and roll them in cocoa powder. Curd sticky, long knead that it is not warm enough from heat source. Well, roll in the cocoa, then the mass will not stick. Put the truffles in the refrigerator for at least 4 hours, but preferably overnight so they harden. Serve immediately from the refrigerator, so they are not warmed up and has not mellowed out.