This thread involves lots of longer-term diabetics answering questions.
All these sweet things do still have sugar in them - from what I learned on that thread, if something has just sugar, or just white carb, and no fat or fibre, the sugars will be absorbed much more quickly. But sweets with fat and fibre in them produce less of a blood sugar spike.
So a hard candy is worse for you than (a tiny amount) of cheesecake, even if both of them have the same amount of sugar in them, iyswim.
I use a lot of baking recipes from this site. It has lots of healthy recipes alongside less healthy ones. I tend to then a) switch sugar to brown sugar, as it tastes sweeter, and has less sugar in it, iyswim b) use a bit less sugar c) change flour from all white to 50/50.
I use a carrot cake recipe from there, a courgette cake recipe, a pumpkin cake recipe. All of which have more fibre in them than normal cakes (even before I do the 50/50 white and brown thing), and hence the sugar is less of a hit.
Oh, and there's a really good oatmeal biscuit recipe in there. It does have sugar, but not that much, most of the sweetening is from the raisins. Here it is. You could probably reduce the sugar a fair whack, too.