Cocktail sauce already has heat in it. The horseradish sees to that. What Tabasco adds is a second kind of burn on top of the first, which is more interesting than just making the sauce hotter. Six ingredients, one bowl, five minutes of work. Then let it sit in the fridge before it goes anywhere near the shrimp.

🌶️ Quick Recipe Snapshot

Flavor Profile	Sweet, tangy ketchup with a hard horseradish bite, sharpened by lemon and vinegar, and a lot of raw garlic running through it
Primary Heat Source	Two of them. Tabasco brings chili heat, the prepared horseradish brings the sinus kind
Heat Level	Moderate, and entirely your call. Tabasco Original runs 2,500 to 5,000 SHU and you decide how much goes in
Texture	Thick and spoonable, with the grain of the horseradish through it
Best Uses	Shrimp cocktail, fried shrimp, oysters, crab
Customization Ideas	More or less Tabasco, a different hot sauce entirely, fresh horseradish in place of the jar, or fewer garlic cloves

Flavor Notes

There are two burns in this bowl and they don’t behave the same way. Horseradish goes upward. It hits the back of your nose, makes your eyes water, and is gone almost as fast as it arrived. Chili heat does the opposite. It settles on your tongue and stays there, building a little, long after you have swallowed. Put both in one sauce and you get a hit and then a hold. That is the whole reason a few dashes of Tabasco does more here than the same amount of extra horseradish would.

Worth knowing what Tabasco actually is before you pour it. The bottle is peppers, salt, and vinegar, aged in barrels, and it is a lot milder than the pepper it comes from. Tabasco Original runs 2,500 to 5,000 Scoville heat units. The tabasco pepper itself sits at 30,000 to 50,000. All that vinegar is doing double duty: it dilutes the heat, and it makes the sauce sharper. Two tablespoons of it on top of three tablespoons of lemon juice is a genuinely tart sauce, which is what you want against something rich and fried.

Adaptation Ideas

Build the heat up, don’t guess it: The recipe calls for two tablespoons of Tabasco. Start with one, stir, taste, and go from there. It is a five-minute recipe with nothing to ruin, so there is no reason to commit up front.
Use a different hot sauce: Every hot sauce brings its own acid and sweetness along with the heat. We have a chipotle version that goes smoky and a sriracha version that goes sweeter and garlickier. Same idea, three different sauces.
Ease off the garlic: Six raw cloves in one cup of ketchup is assertive, and it gets more so as the sauce sits and the garlic spreads through it. Three is plenty for most people. Grating the cloves instead of mincing them spreads the flavor more evenly, if you want all six.
Grate your own horseradish: Fresh is sharper than the jar by a wide margin. If you are using prepared, check how long the jar has been open — horseradish loses its bite over time, and an old jar is mostly vinegar.
Add Old Bay or celery salt: A half teaspoon takes this toward the seafood-boil end of things. It goes with everything you would dip in it anyway.

Serving Ideas

Shrimp cocktail: What it is for. Cold, in a glass, with the tails hanging over the rim if you want to do it properly.
Fried seafood: Fried shrimp, calamari, crab cakes, fish and chips. The sauce is tart enough to cut through the batter, which is most of its job here.
Oysters on the half shell: A small spoon on top, or in a dish alongside with a lemon wedge. Purists will object. Let them.
Alongside a seafood boil: Put the bowl in the middle of the table with the Old Bay shrimp and let people go at it.
A spoonful in a Bloody Mary: Tomato, horseradish, and hot sauce are already in that drink. This is a shortcut to all three.

Storage Notes

Make it ahead. This is not one of those recipes where you should, it is one where you have to. Straight out of the bowl it tastes like ketchup with things stirred into it. Half an hour in the fridge and it reads as one sauce. An hour or two is better.

It keeps a week or two covered in the fridge, and it is well set up for it. Ketchup, vinegar, lemon juice, and salt are all doing preservative work. What fades first is the horseradish. Its bite is the least stable thing in the bowl and it goes quiet after a few days, so if the sinus hit is the point, make it the day before you need it rather than the week before. The garlic goes the other way and gets more noticeable, which is worth knowing if you already thought six cloves was a lot.

Don’t freeze it. A ketchup-based sauce comes back watery, and the horseradish comes back with nothing left to give.

Like This Recipe? You’ll Love These Too:

Chipotle Cocktail Sauce: The same sauce with smoky chipotle in place of the Tabasco. A high-heat combination with horseradish.
Sriracha Cocktail Sauce: Sriracha and horseradish together, which stings twice over. Extra oomph for a shrimp cocktail.
Spicy Boiled Old Bay Shrimp: The obvious thing to dip in it. A Maryland-spiced wallop in almost no time.