In the bowl of a food processor, combine all ingredients. Pulse to combine. You want to make sure that the chocolate chips are chopped tiny enough to fully incorporate into the mix (and then they'll melt better, too)!
Once the mix is fully combined, store in an airtight container until ready to use. Recipe makes about 3¾ cups of mix, which will make about 12 cups of hot cocoa.
To use: combine 1 cup warm milk (see note) with 5 tablespoons hot cocoa mix. Stir to incorporate.Enjoy!
Notes
Note on dry milk powder: Milk powders can vary widely in quality and flavor. I used an organic nonfat dry milk powder. You can find it online [here].Note on cocoa powder: I used a dark unsweetened cocoa powder (this one [here]) for deep chocolate flavor.Note on cornstarch: The cornstarch isn't necessary if you prefer to leave it out. That said, it helps keep the mix from clumping up, and helps it to better incorporate into the hot milk, so I prefer to add it.Note on milk: because the mix contains the dry milk powder, you can also make the hot cocoa with hot water if you prefer. I like to make it with milk so that it's thicker and creamier!