I've never eaten BK onion ring sauce, so I'm not rating this on whether or not it is their recipe. We loved this sauce, especially the addition of the horseradish. I will make it again, but because I'm a heat wimp I plan to cut back on the amount of cayenne. I had no problems, like another reviewer, with it being runny. I also served it with french fries as I didn't have the makings for onion rings. Made for Fall 2012 Pick A Chef.
it was close, but not exactly like BK. mine was more runny. think it could use a bit more horseradish.
I don't eat horseradish anything , so this review is from my daughter and husband. Both said it was VERY close to BK's onion ring sauce. We happened to have a container of it in our fridge, when compared side by side , the BK sauce is more red/orange ... Both said it's no slouch for a good dipping sauce! Thanks for posting!