Hi Charles -

For some reason that recipe never made it onto our website. I've included it below:
1 cup heavy cream
¼ cup sour cream
2 tablespoons packed brown sugar
½ teaspoon vanilla extract
Pinch kosher salt
*In the bowl of a stand mixer,* combine all ingredients. Using the whisk attachment, mix on low until uniform and frothy, about 30 seconds. Increase the speed to medium-high and whip until soft peaks form, 1 to 2 minutes.

Best,
The Milk Street Team