Do I have to use a vanilla bean?
No. Vanilla bean is the “wow” option, but you can absolutely use pure vanilla extract. If you have it, vanilla bean paste is a great middle ground for that speckled look and deeper flavor.
Why is my ice cream icy?
The usual culprits are: the base was not cold enough before churning, the churn took too long because the freezer bowl was not fully frozen, or the base did not have enough dissolved sugar and fat for a smoother freeze. For this recipe, make sure the base is refrigerator-cold and your freezer bowl has had at least 24 hours in the freezer.
Can I make this without eggs?
You can, but it will be a different style. Eggs give custard body. If you want egg-free, use a Philadelphia-style base (milk, cream, sugar, vanilla) and consider adding 1 to 2 tablespoons of corn syrup or 2 tablespoons of milk powder for a softer texture.
What if my custard curdles?
First, do not panic. Pull it off the heat immediately and blend it with an immersion blender, then strain. Next time, cook on medium-low and stir constantly, especially around the edges.
What does “nappe” mean and do I need a thermometer?
Nappe is when the custard coats the back of a spoon and you can draw a line through it and the line holds. A thermometer is helpful but not required. If you use one, aim for 170°F to 180°F as a guide, and remember it will continue to thicken a bit as it cools. Try not to push past 180°F.
My ice cream maker is 2 quarts. Should I double it?
Not automatically. Most machines need headspace for the ice cream to expand while churning. If your machine is 2 quarts, you can often scale this up by 1.25x, but check your manual. When in doubt, make one batch and churn like a boss.