I have a question about the recipe "Craquelin-Style Buns" from Erin McDowell. I have a sudden urge to make these buns, but no sugar cubes or oranges handy. I'm wondering if I could substitute something for the buried nugget - maybe a chunk of brown sugar, vanilla and cinammon? Or a brown sugar nugget infused with good maple syrup (which I have in abundance)? I also have orange oil, but a teensy bit of that goes a long way. Seems like some combo of these would work, if not replicate the classic. Also, have you ever frozen these, after baking?