Combine the chocolate chips, chocolate hazelnut spread, cocoa nibs and salt in a blender.
Heat the almond milk until just about to simmer in a small saucepan. Pour the hot milk over the chocolate in the blender and allow it to sit for 30 seconds. Remove the middle section of the lid to allow steam to escape and hold a folded towel over the top of the lid, then begin blending the hot mixture on low speed, increasing the speed to high once it gets going. (Be careful not to go too high too quickly to prevent splattering.) Blend on high for 30 seconds. Pour into 4 mugs and serve.
When blending hot liquid, first let it cool for five minutes or so, then transfer it to a blender, filling only halfway. Put the lid on, leaving one corner open. Cover the lid with a kitchen towel to catch splatters, and pulse until smooth.