When you make Ranch Dressing from the packet and add milk and mayo, can you....

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.....do the same if you ACCIDENTALLY bought the Hidden Valley Ranch DIPS instead of the salad dressing mix? It says to mix it with sour cream (obviously to make some kind of dip to use for dipping raw vegetables) - and I have a salad sitting here and I want to make the salad dressing, NOT the dip, even though I have the one that says "Dips" on the packet. I don't have any sour cream. I wanna make it with the milk and mayo, can I still do that? Or will it taste weird because it's supposed to be a dip instead and I didn't use sour cream like I was supposed to...