In a heavy bottom pot, over medium high heat, bring the milk, heavy cream, salt, and vanilla to a boil.
2 Cups Whole Milk, 2 Cups Heavy Cream, pinch Salt, 1 Teaspoon Vanilla Extract
Once a boil has been reached, turn off the heat and remove the pan from the hot burner.
While waiting for the milk mixture to come to a boil, blend together the egg yolks and the sugar until they are light and fluffy, about 2 minutes in a blender.
13 Egg Yolks, 1 ¼ Cup Sugar
Create a liaison of the hot milk and the sugared egg yolks by whisking the egg yolks and slowly pouring ¼ cup of the hot milk into the yolks while vigorously whisking. Pour too fast here and you will scramble the eggs instead of tempering them; slow and steady is the whole technique.
Repeat, ¼ cup at a time, until ½ of the milk mixture has been added to the yolk mixture.
Continually whisking, combine the yolk and milk mixture with the remaining milk mixture.
Pour the combined mixture back into the pot.
Turn the heat to medium and continually stir the mixture until the temperature reaches 175 to 185F, or coats the back of a spoon.
Strain the base through a fine mesh strainer, even if you tempered carefully; a little cooked egg always sneaks through, and straining is what keeps the finished ice cream silky instead of grainy.
Immediately cool the base in an ice bath.
Puree all but ½ cup of the black raspberries and pass through a fine mesh strainer or cheese cloth the remove the seeds.
2 Cups black raspberries
When completely cooled, add the black raspberry purree to the base and process in the ice cream machine according to the manufactures instructions.
Spoon ½ the semi-frozen homemade ice cream into your freezer safe container and spread half the whole berries over the ice cream. Top with the rest of the ice cream and the remaining berries.
½ Cup black raspberries
Transfer the container to the freezer and freeze until firm, at least 4 hours. Press a layer of parchment or plastic wrap directly against the surface of the ice cream before sealing to prevent ice crystals from forming on top.
Serve