Mix the dry milk powder, sugar, salt and guar gum if using in a bowl (guar gum, especially can clump if added to a wet ingredient alone).

Add the half and half and vanilla to the blender and start mixing on low.  Gradually pour in the dry mix mixture.  Blend until well combined.

Pour into your ice cream freezer and process according to the manufacturer’s directions.

When gelato is almost done, melt the cocoa butter, coconut oil or butter in a small bowl in the microwave.  Stir in your chocolate chips, then alternate stirring with brief bursts (5-10 seconds) in the microwave until melted.

Slowly drizzle the melted chocolate into your nearly frozen gelato.  When mixed in, scoop the finished gelato into a freezer container to firm up more (recommended) or eat immediately.