Lemon Ice Cream
Ice Cream · Custard
Creamy Lemon Ice Cream
Bright and perfumed rather than merely sour — the flavor comes from zest rubbed into the sugar, and the juice goes in only once the base is fully cold.
Ingredients
- 4 large lemons (zest of all 4; ⅓ cup juice)
- 1 cup granulated sugar, divided
- ¼ tsp salt
- 6 large egg yolks
- 2 cups heavy cream
- 1 cup half-and-half
- 1 tsp vanilla extract
- Optional: 1 Tbsp light corn syrup or honey (smoother texture)
- Optional: 1 Tbsp limoncello or vodka (softer scoop)
Method
- Zest all 4 lemons into a bowl with ¾ cup of the sugar. Rub the zest into the sugar with your fingertips for about a minute, until damp, clumpy, and intensely fragrant. Juice the lemons, measure out ⅓ cup, and refrigerate it.
- In a medium saucepan, heat the cream, half-and-half, lemon sugar, salt, and corn syrup if using until steaming but not boiling. Pull off the heat, cover, and steep the zest 20–30 minutes. This is where the flavor comes from.
- Rewarm the dairy until steaming. Whisk the egg yolks with the remaining ¼ cup sugar until pale, about 2 minutes.
- Slowly whisk about 1 cup of the hot cream into the yolks to temper, then pour it all back into the saucepan.
- Cook over medium-low, stirring constantly, until it reaches 170–175°F and coats the back of a spoon, 2–4 minutes. Don't let it boil.
- Strain the custard into a clean bowl, pressing on the zest to squeeze out every bit of oil, then discard the solids. Stir in the vanilla.
- Cover and chill at least 4 hours, ideally overnight. It must be completely cold before the next step.
- With the base fully chilled, whisk in the cold lemon juice in a slow stream, plus the limoncello if using. It will thicken noticeably — that's correct. Taste now: if it's too tart, whisk in a tablespoon or two more sugar until dissolved.
- Churn 20–30 minutes to soft-serve consistency.
- Transfer to a container, press plastic wrap onto the surface, and freeze 4–6 hours. Let it sit out 5–10 minutes before scooping.
Variations
Lemon cookie. Fold in ¾ cup crushed shortbread or Biscoff during the last 20 seconds of churning. The buttery crunch against the tart base is excellent.
Lemon curd swirl. Layer ½ cup lemon curd in ribbons as you transfer to the container — don't stir, just layer, so you get distinct streaks.
Notes
The flavor is in the zest, not the juice. Lemon oil lives in the peel, and rubbing it into the sugar releases those oils. Skip that minute and you get sour instead of perfumed.
Never add juice to warm custard. Acid plus hot dairy curdles. Wait until the base is fully chilled, then whisk the cold juice in slowly — the slight thickening is the same reaction that sets a lemon posset, and it's good for body.
Expect a softer freeze than the peach, with less fruit solid in the base. Brighter and more refreshing, too.