Cooks at legendary Alfred’s Steakhouse, in San Francisco, prepared horseradish by whirring small chunks of peeled horseradish root in a food processor with just enough Champagne vinegar to moisten. Store-bought prepared horseradish is fine, but isn’t as fluffy and fresh-tasting. The sauce is terrific with grilled steak.
With a mixer using the whisk attachment, whip cream and cream cheese on medium speed until whisk just begins to leave marks, about 4 minutes. Remove from mixer and add horseradish, pepper, 2 tsp. lemon juice, and 1/2 tsp. salt. Whisk by hand to blend and thicken. Taste and add more salt and lemon juice if you like.
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.