Ingredients

• 1 cup sugar
• 1/2 cup light corn syrup
• 1/4 cup water
• 1/8 teaspoon salt
• 2 cups plain whole-milk Greek-style yogurt
• 1 cup well-shaken buttermilk
• 5 teaspoon fresh lemon juice
• Equipment: an ice cream maker

Instructions

1. Warm sugar, corn syrup, water, and salt in a small saucepan over low heat, stirring, until sugar has dissolved. Transfer to a large bowl and cool to room temperature, stirring occasionally.
2. Whisk in yogurt, buttermilk, and lemon juice and chill until very cold, 3 to 6 hours.
3. Freeze yogurt in ice cream maker. Transfer to an airtight container and put in freezer to firm up.