These milkshakes may be one of the best tasting concoctions ever, in my humble opinion. Available from Burgerville in the Pacific Northwest, these drinks are only available when hazelnuts are in season, since Burgerville does its best to only use fresh, local ingredients. While I feel that chocolate hazelnut milkshakes are better than Burgerville's more popular Huckleberry shakes, that is obviously just my opinion.
You can easily make these shakes yourself by just making a peanut butter milkshake and substituting Nutella for the peanut butter. Not quite as good as B-ville's, but delicious nonetheless.