In a saucepan, over medium-high heat, add the milk, and heavy cream, and bring it to a simmer. Mix constantly to prevent the milk from burning in the bottom of the pot. Turn off the heat while you mix the egg yolks.
In a small mixing bowl, add the egg yolks, and sugar, and mix with a whisk until well combined.
Slowly pour ¼ of the liquid into the egg yolk mixture mixing constantly with a whisk. This allows us to temper the eggs and stop them from turning into scrambled eggs.
Pour the mixture back into the saucepan over low heat, and continuously mix with a rubber spatula, not with a whisk, since we want to see the texture and prevent foam from forming.
Cook it for about 5-7 minutes until it thickens enough to coat the back of the spoon. Be careful not to let it boil.
There are two ways to know when your creme anglaise is ready:
The Spoon Test
One of the most reliable ways to check the doneness of crème anglaise is the spoon test. Dip a wooden or metal spoon into the custard and run your finger across the back of the spoon.
If the line holds its shape and the custard coats the spoon, it's ready. If the custard runs right off, it needs more time on the heat.
Temperature Control
Using a thermometer is the most precise way to monitor your crème anglaise.
The ideal temperature range is between 179-183°F (82-84°C). Once it reaches this point, immediately remove it from the heat to prevent overcooking and curdling.
Add chopped dark chocolate into a large mixing bowl, and pour the warm creme anglaise over the dark chocolate. Allow it to sit for 1 minute to allow to chocolate to melt.
Use a whisk to mix the chocolate and creme anglaise, until well combined. I like using an immersion blender to create a perfect immolation.
Strain the mixture through a fine mesh sieve and pour it into a shallow pan, cover it with plastic wrap making sure that the plastic wrap is in contact with the entire surface to prevent skin from forming on top.
Allow it to cool and set in the fridge overnight or at least 5 hours.
Remove the pan from the fridge remove the plastic wrap and use as needed.
Notes
Use a rubber spatula to make the creme anglaise so you see the texture of the cream without creating foam with a whisk.
Choose the Right Chocolate: Select a high-quality dark chocolate with a cocoa content of 70% or higher for maximum flavor and richness.
Prepare your creme anglaise base to the perfect consistency. It should be thick enough to coat the back of a spoon, but still warm and pourable.
For the creme anglaise temper the eggs properly. Slowly whisk a small amount of the hot milk mixture into the egg yolks to gently raise their temperature before adding them back to the pan. This prevents the eggs from scrambling.
When your creameux is done, add a plastic wrap on top of the cremeux to prevent a skin from forming.
Chill the crémeux thoroughly before serving, allowing it to set up into a silky, spoonable consistency.
Whisk vigorously to create a silky-smooth texture, then finish with an immersion blender to make sure the emulsion is perfect.
Allow the dark chocolate to sit in the warm creme anglaise for a few minutes to allow the chocolate to melt.