Thanks people. It's refined/white sugar she doesn't eat. I can't see the difference either between that and say, grapes, but I guess there is one. Curious if anyone here would know. I'm a bit careful with overloading on sweet things myself, but that's a blood sugar thing, so it makes no difference what kind of sugar. Since my dh so often has to pass on the really yummy desserts and sauces at restaurants I try to be a bit extra considerate of people's dietary restrictions when I can, but this one had me stumped.

I'm bringing blueberry muffins

ps. yup, I remember reading that ketchup has as much sugar as chocolate sauce. My poor son gets told that every time he reaches for the ketchup bottle On the other hand, it did teach me that tomato sauces taste a lot better with a pinch of sugar in them.