A bright, zesty homemade cocktail sauce with adjustable heat that mixes up in minutes and beats store-bought. Perfect for shrimp, crab, oysters, and more.
Use refrigerated prepared horseradish for the best heat; old jars lose potency. If ketchup is very sweet, add extra lemon juice or a splash of white wine vinegar. Do not substitute creamy horseradish. Sauce keeps 1–2 weeks in the refrigerator; do not freeze. Adjust heat with more horseradish and hot sauce. Optional variations: add smoked paprika or chipotle hot sauce, 1/2 tsp Old Bay, 1 tbsp tomato paste (increase lemon), a splash of pickle or olive brine with celery salt, or use tomato sauce plus a bit of honey instead of ketchup.