In a bowl combine chocolate pieces, cream, Nutella and butter.
Place the bowl over a another bowl of barely simmering hot water.Make sure the bottom does not touch the water. (If you have a double boiler, go ahead and use it).
Melt until it forms a smooth paste.
Make sure there are no lumps.
Take it off the heat, and keep aside for 10 minutes.
Add vanilla essence.
Refrigerate for 4-6 hours.
Crush butter biscuits into coarse crumbs. (You can put it in a ziploc and roll a rolling pin over it. I used my fingers.)
Line a tray with parchment paper.
Take out the chocolate paste. It should now b semi hard but pliable enough. If it is too hard, set it on the counter for about 15 minutes. It should soften enough to work with.
Scoop out a small portion and roll it gently between your palms and fingers, shaping into a small ball.
Roll it over the biscuit crumbs.
Place the balls over parchment lined tray.
Refrigerate the truffles/bon bons till you are ready to use.
Recipe by The Lady 8 Home at https://www.thelady8home.com/happy-halloween-with-nutella-chocolate-truffles/