Make the base
~15-20 minutes including clean up. Probably longer the first time :)
- Combine the 1/2 cup sugar, the dry milk powder, and the xanthan gum in a small bowl and stir well.
- In a large bowl, combine the egg yolks and the remaining 2 tablespoons sugar and whisk until the yolks are lighter in color, about a minute
- In a medium pot, combine the corn syrup and the heavy cream
- Add the sugar mixture and immediately whisk vigorously until smooth.
- Set the pot over medium heat and cook, stirring often and adjusting the heat if necessary to prevent a simmer, until the sugar has fully dissolved, about 3 minutes.
- Remove the pot from the heat.
- Start whisking the yolk mixture and continue to whisk constantly while slowly drizzling the hot cream into the yolks.
- Add the buttermilk and whisk until fully combined. Transfer the base to an airtight container and refrigerate until well chilled, at least 6 hours, or for even better texture and flavor, 24 hours.
Make the jam
~10-15 minutes including cleanup. Probably longer the first time. Lasts up to 3 months in the fridge.
- Puree the blueberries in a food processor
- Heat the blueberry puree, lemon juice and pectin in a medium pot over medium heat until it reaches a boil
- Stir in the sugar and continue to cook over medium heat until the mixture comes back to a boil
- Immediately remove pot from heat and let jam cool to room temperature.
- Chill jam thoroughly before using
Make the Ice Cream
- In a bowl, combine the very cold buttermilk custard base, lemon zest and juice and salt and whisk to get the lemon fully incorporated.
- Pour the mixture into an ice cream maker and turn on the machine.
- Churn according to manufacturer’s recommendation.
- Meanwhile, stir the jam with a folk to loosen
- Once ice cream has churned, alternate in layers spooning in ice cream and jam into a freezer-friendly container
- Store in the coldest part of your freezer for at least 6 hours.