Add tofu, ketchup, lemon juice, coconut aminos, mustard powder, paprika, and black pepper to a blender or food processor. Blend until silky smooth.
Gently stir in the chopped red onion and sweet pickle relish. Don’t blend these in—you want the texture.
For best results, let it rest in the fridge for 20–30 minutes to chill and allow flavors to meld. Stir again before using.
Notes
Use firm silken tofu. For best texture, go with firm silken tofu not soft or extra firm. It blends smooth while keeping a good body without becoming watery.
Don’t skip the stir-in step. Blending the relish and red onion can make the dressing overly smooth and lose that classic Thousand Island texture. Stirring them in after blending keeps it authentic.
Make it your own. You can adjust the sweetness or tang by tweaking the ketchup and lemon juice. Add more pickle relish for extra punch or a pinch of cayenne for heat.
Storage tip. Store in an airtight glass jar in the fridge. It will keep well for up to 5 days. Give it a quick stir before each use.
Meal prep friendly. This dressing is perfect for making ahead to use throughout the week on sandwiches, salads, wraps, and bowls.
Great for kids and picky eaters. The familiar flavor profile makes this dressing a hit for all ages, especially when served with sliders or potato dishes.