In a large saucepan, whisk together the brown sugar, spices, and salt.
Add the egg yolks and whisk well until smooth.
Add the pumpkin puree, and whisk again until smooth.
Slowly add the cream and the milk, whisking until everything is well incorporated.
Set the pan over medium/low heat and cook for about 10-12 minutes, stirring constantly with a whisk or a silicone spoonula until the mixture is steaming, thickened slightly, and just about to come to a boil.
Remove from the heat and pour the mixture through a fine mesh strainer into a bowl.
Stir in the vanilla extract and the alcohol (if using). Chill the mixture in the refrigerator until completely cold (you can do this overnight if you like.)
Process in your ice cream machine according to its directions.
Spoon the soft ice cream into a container and enjoy as soft serve or freeze until firm. This will take several hours.
Notes
The optional alcohol helps the ice cream stay softer for longer in the freezer because the freezing point of alcohol is higher than water. Bourbon, another whiskey like rye, or spiced rum pair nicely with the other flavors in this recipe. Use vodka for a neutral flavor. You will not notice a strong alcoholic taste in the final ice cream).
Nutritional information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although The View from Great Island attempts to provide accurate nutritional information, these figures are only estimates.
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