Vanilla-Custard Ice Cream Base
- 1 cup whole milk
- 1 1/2 cups heavy cream
- 1 vanilla bean, split and scraped
- 6 large egg yolks
- 3/4 cup sugar
- 1/4 teaspoon coarse salt
Combine milk and cream in a medium saucepan. Add vanilla seeds and pod. Bring mixture to a simmer over medium-high heat, stirring occasionally; remove from heat.
Whisk together egg yolks, sugar, and salt in a large bowl. Gradually whisk in half of milk mixture. Pour egg-milk mixture back into pan and cook over medium heat, stirring constantly, until thick enough to coat the back of a wooden spoon, 6 to 8 minutes.
Pour custard through a fine sieve into a bowl set in a larger bowl of ice water; discard vanilla pod. Let cool, stirring occasionally. Cover and refrigerate until cold, at least 1 hour; custard base can be refrigerated up to 2 days ahead.