In a small pot, simmer cream, milk, sugar and salt until sugar completely dissolves, about 5 minutes. Remove pot from heat. In a separate bowl, whisk yolks. Whisking constantly, slowly whisk about a third of the hot cream into the yolks, then whisk the yolk mixture back into the pot with the cream. Return pot to medium-low heat and gently cook until mixture is thick enough to coat the back of a spoon (about 170 degrees on an instant-read thermometer).
Strain through a fine-mesh sieve into a bowl. Whisk in Nutella and vanilla. Cool mixture to room temperature. Cover and chill at least 4 hours or overnight.
Churn in an ice cream machine according to manufacturer’s instructions. Serve directly from the machine for soft serve, or store in freezer until needed.
Recipe by Sprung At Last at https://sprungatlast.com/2014/07/nutella-ice-cream/