In a large sauce pan combine half and half, heavy cream, and vanilla bring mixture to a simmer over low heat for 10 minutes.

With a mixer combine eggs, egg yolks, sugar, and cocoa. Beat for 3 minutes, stopping to scrape bowl once. Mixture should be thick and smooth.

Remove 1 cup of hot cream from pan, and ever so slowly drizzle hot cream into chocolate while mixing, until completely combined and smooth. Do not stop mixing while adding hot cream. Add slowly.

Add tempered (warmed) chocolate mixture back into hot cream, while continuously whisking. At this point add in the chocolate chips and let them melt in to the mixture.  Whisk over medium-low heat for 5 minutes or until ice cream mix becomes thick like pudding. Don not stop whisking. Remove from heat and let cool. Transfer to a freezer safe carton, place in refrigerator until completely cool.

Transfer cooled ice cream mix to bowl of ice cream maker, turn machine on and let mix until thickened, approximately 20-30 minutes.