Thousand Island vs. Russian Dressing: What’s the Difference

Thousand Island and Russian dressing look similar enough on a plate that many people use the names interchangeably, but they’re genuinely distinct condiments with different ingredients and different histories. This matters directly for a sandwich like the Reuben, which traditionally calls for Russian dressing rather than Thousand Island.

Here’s what actually separates the two, and why the distinction is worth knowing rather than treating them as the same sauce under two names.

Both dressings share a mayonnaise-and-ketchup foundation, which is exactly why they’re so often confused, but the specific additions to that base are what create two genuinely different flavor profiles.

Understanding this distinction is also useful well beyond just the Reuben — both dressings show up on burgers, other sandwiches, and salads throughout American food culture, and knowing which one you’re actually reaching for helps you choose deliberately rather than grabbing whichever bottle happens to be closest.

Ingredient Differences

Modern Russian dressing recipes almost always build on a foundation of mayonnaise, ketchup, and horseradish, which gives it real bite and spiciness. Thousand Island dressing starts from a similar mayonnaise-and-ketchup base but adds sweet pickle relish as the defining ingredient, along with optional additions like extra sugar, minced onion, or hard-boiled egg — something Russian dressing never includes.

Flavor Profile

Russian dressing is spicy and sharp, driven by horseradish. Thousand Island is sweeter and chunkier, driven by the pickle relish, with a milder overall bite. Side by side, the two are noticeably distinguishable once you know what to taste for, even though a quick glance at the color alone might not reveal much difference.

Where Each One Actually Came From

Russian dressing was invented in New Hampshire by a grocery store owner named James Colburn. Despite the name, it has no real connection to Russia — it became known as “Russian” because the original version included caviar, and got its pink tint from poached coral and pulverized lobster shell rather than anything Russian in origin. Thousand Island dressing takes its name from the actual Thousand Islands region along the New York–Ontario border, where several competing origin stories place its development in the late 1800s and early 1900s.

Why Russian Dressing Belongs on a Reuben

Russian dressing’s horseradish bite cuts through the richness of hot corned beef, Swiss cheese, and sauerkraut in a way Thousand Island’s sweeter profile doesn’t do quite as effectively. That said, many delis, including Mabel’s Deli, use Thousand Island on their Reuben anyway, a common and widely accepted substitution rather than a deviation worth objecting to.

A Note on Big Mac Sauce

Thousand Island dressing is also the base for the “special sauce” on McDonald’s Big Mac — a detail that surprises a lot of people who assume that sauce is something entirely proprietary rather than a variation on a well-known dressing.

Frequently Asked Questions

What is the main ingredient difference between the two?

Russian dressing relies on horseradish for its bite; Thousand Island relies on sweet pickle relish for its sweetness and chunkiness.

Is Russian dressing actually from Russia?

No — it was invented in New Hampshire, and the name comes from an original recipe that included caviar, not any actual Russian origin.

What traditionally goes on a Reuben sandwich?

Russian dressing is traditional, though Thousand Island is a widely accepted and common substitution at many delis.

Is Thousand Island dressing related to McDonald’s special sauce?

Yes — the Big Mac’s special sauce is built on a Thousand Island dressing base.

Which dressing is spicier?

Russian dressing, thanks to its horseradish content; Thousand Island is milder and sweeter.

Can I make either dressing at home easily?

Yes — both start from a simple mayonnaise-and-ketchup base, making either one quick to make with a few added ingredients.

Does Russian dressing contain seafood?

The original 19th-century version did, using caviar and lobster shell for color, but modern Russian dressing recipes typically don’t include seafood at all.

For more on the history of these dressings, see Mental Floss.