Homemade Eggnog

Bahan-bahan (6 porsi)

• 6 large egg yolks
• 1½ cups heavy cream
• ½ cup sugar
• ¼ teaspoon salt
• 2 cups whole milk
• 1/3 cup dark rum ((bourbon or brandy can be substituted), plus more if desired)
• Scant 1/4 teaspoon teaspoon ground nutmeg
• 1/8 teaspoon ground cinnamon
• Whipped cream, (for serving (optional))