Rhubarb Ice Cream With a Caramel Swirl

Step 1

In a heavy-bottomed pot over medium heat, whisk together the milk, 3/4 cup sugar, the salt, the vanilla bean seeds and its pod. Simmer gently until sugar dissolves, about 5 minutes. Remove from heat, cover, and steep 30 minutes. Discard the vanilla pod and return mixture to a bare simmer.

Step 2

Place the yolks in a large bowl. Slowly whisk in hot milk mixture. Scrape the custard back into the pot and cook over medium-low heat, stirring constantly, until mixture is thick enough to coat the back of a spoon, about 5 minutes. Strain through a fine-mesh sieve into a bowl. Whisk in sour cream. Chill at least 3 hours or overnight.

Step 3

In a saucepan, combine the rhubarb with 1 cup sugar. Simmer until rhubarb is just tender and has begun releasing its juices, but has not started to fall apart, 4 to 5 minutes. Using a slotted spoon, transfer rhubarb to a bowl. Continue to simmer the juices until syrupy, 5 to 10 minutes more. Pour the syrup over the rhubarb. Cool completely.

Step 4

In a clean, dry and preferably nonstick skillet, sprinkle 2 tablespoons sugar over medium heat. When it begins to melt and lightly color, sprinkle in 2 more tablespoons and start swirling pan to help evenly distribute sugar. Add the final 2 tablespoons and cook, swirling pan until all the sugar has melted. Let cook, swirling occasionally, until the sugar syrup caramelizes and turns dark brown. Pour in the heavy cream and 2 tablespoons water (stand back; it may splatter). Simmer, stirring with a heatproof rubber spatula until smooth. Cool completely.

Step 5

Pour the custard base into an ice cream machine and churn. Add rhubarb compote for the last minute of churning.

Step 6

Scrape a quarter of the caramel into the bottom of a freezer-proof quart container. Top with a quarter of the ice cream. Repeat layering until all of the caramel and ice cream has been used, ending with the ice cream. Freeze until firm for at least 2 hours and up to 1 week.