I think mayo would actually improve it lol. it'll be more of creamy sauce and mayo doesn't have to much of a flavor so idt it'd taste funny.

@geekymomma13, I just mixed one part water and one part mayo to thicken it up. Hopefully that will work and I didn't ruin it. I hate wasting food.

I've actually just used water like what it says is needed for water and whatever measurement for milk I put in additional water. it tastes a little different and the sauce is a little thinner