Burger sauce-how long will it keep?

[CurlewKate]

We were having a barbecue tomorrow, but it's been postponed til next weekend. I made a in-and-out burger sauce (fried
onions ,chives,gherkins,mayonnaise and ketchup). Would you keep it in the fridge for a week? I would-but dd is making me doubt myself. Votes?

I’ve just googled the recipe and it says it keeps in the fridge for up to two weeks. I imagine it will separate though so will need a good mix.

@LessYappingMoreDoing Oh, thank you! The recipe I used didn't say. Glad to know I'm not going to poison everyone!