Step 1

In a large saucepan set over medium heat, combine milk, 1 cup heavy cream, sugar, and egg yolks and bring to a simmer.

Step 2

Simmer the mixture for 15 minutes, whisking continuously.

Step 3

The mixture will gradually thicken slightly and once thickened add in the chocolate.

Step 4

Whisking continuously, bring the mixture back to a rapid simmer, then remove from the heat and rest for 3 minutes. Repeat this process of bringing to a simmer and removing from the heat 4 more times (5 times in total). If the chocolate seizes and becomes lumpy and oily, run the mixture through a sieve and whisk in 1 to 3 tablespoons of heavy cream. Once simmered 5 times, strain into a heat safe bowl and whisk in vanilla extract.

Step 5

Portion the mixture into individual glasses or cups and refrigerate until cool, about 1 to 2 hours.

Step 6

Serve with whipped cream and enjoy.