A bold, five-minute cocktail sauce made from ketchup and prepared horseradish, brightened with fresh lemon juice and Worcestershire, that beats any bottled version with a sharp, sinus-clearing bite.
Glass jar with airtight lid - 12 ounce (350 ml) jar for storing the full batch
Small ceramic serving bowls - For individual dipping portions
Ingredients
1cupketchup - 240 g; sweet, tangy tomato base, a version without high fructose corn syrup gives a cleaner flavor
3tablespoonsprepared horseradish - 45 g, plus up to 1 tablespoon (15 g) more for extra heat; refrigerated horseradish has a sharper bite than a shelf jar
1tablespoonfresh lemon juice - 15 ml; about half of a small lemon, seeds removed
Squeeze half a small lemon to get 1 tablespoon (15 ml) of juice and pick out any seeds. Measure the ketchup, horseradish, Worcestershire, hot sauce, and black pepper.
Add the ketchup to a small glass bowl, spoon the horseradish on top, and whisk for about 30 seconds until no pale clumps remain and the color is uniform red with tiny flecks.
Pour in the lemon juice, Worcestershire sauce, and hot sauce, then sprinkle in the black pepper. Whisk for 15 to 20 seconds until smooth and glossy.
Taste with a clean spoon and wait a few seconds for the heat to build. Add up to 1 more tablespoon of horseradish a teaspoon at a time for heat, or a few drops of lemon juice for tang.
Transfer the sauce to a glass jar with an airtight lid, scraping the bowl clean, and refrigerate for at least 30 minutes so the horseradish blends into the ketchup.
Give the sauce one last stir, spoon it into small serving bowls, and serve cold with shrimp, oysters, crab, or fried seafood.
Notes
Start with 3 tablespoons of horseradish and taste before adding more; a heaping scoop at the start can make the sauce too sharp to dip.
Use a whisk instead of a spoon to break up horseradish clumps that otherwise create pockets of intense heat.
Use a recently opened jar of prepared horseradish, since the heat fades once a jar has been open for a while.
Fresh lemon juice tastes brighter than bottled, which can be dull and slightly bitter.
Very sweet ketchups can overpower the horseradish, so choose a tomato-forward brand for a sharper sauce.
Chill for at least 30 minutes (up to 2 hours) before serving; the flavor intensifies as it sits, so stop seasoning slightly before it tastes perfect.
Store in an airtight glass jar in the refrigerator at 40°F (4°C) or below for up to 2 weeks; do not freeze, as thawing makes it watery and dulls the horseradish.
Do not leave the sauce at room temperature for more than 2 hours; on a hot day, serve it in a bowl set over ice.
To fix a sauce that is too hot, stir in a tablespoon of ketchup or a squeeze of lemon; to fix a mild sauce, whisk in horseradish a teaspoon at a time and wait a few minutes before tasting.
For a chili sauce variation, replace half of the ketchup with ½ cup (120 g) of chili sauce for a chunkier, spicier result.