There are a MILLION fry sauce recipes out there; some have a TON of ingredients, some have just a handful. This is our recipe.
1/2 cup mayonnaise
1/2 cup ketchup
2 tablespoons finely minced dill pickles (see note below)
1 teaspoon regular old yellow mustard
dash of salt
scant 1/2 teaspoon freshly ground black pepper
1 teaspoon white vinegar
1 teaspoon sugar
When I make this, I put the pickle into the food processor first and pulse it until it is finely minced (2 tablespoons minced pickle is about 1 large pickle). NOTE: You can also just use 2 tablespoons of your favorite pickle relish.
Then add the rest of the ingredients and pulse them all together until the sauce is well mixed and smooth. You can do this in a full size food processor, although a small food processor (or an hand held immersion blender) works even better.
This recipe makes one cup of French fry sauce. Keep chilled. It is excellent to dip just about anything in, but it is also good on hamburgers.