David, the beans are Navy (or Haricot) beans (and despite the name are stewed not baked). They are about 4% sugar .... the rest of the sugar in the tin is in the sauce or added. So for a selection of brands here are the added sugar values:
Watties (in tomato sauce) 7.1% (added 3.1%)
IGA (in tomato sauce) 5.4% (added 1.4%)
Weight Watchers (in tomato sauce) 5.3% (added 1.3%)
Coles (in tomato sauce) 4.7% (added .7%)
Weight Watchers (tomato sauce salt reduced) 4.5% (added .5%)
Heinz (in tomato sauce) 4.2% (added .2%)
Heinz (salt reduced) 4.2% (added .2%)
SPC (in rich tomato) 3.4% (added 0%)
A half cup of baked beans is about 150g (and that's generally the recommended serve). Given all of that, it hardly seems worth messing with the contents as long as you avoid some of the more sugary brands (Watties, IGA and WW ... ) ... If it were me, I'd go for SPC
That Bailey's recipe sounds like a wicked (once a year :-) ... treat! ... Lizzie has worked up a yummy Mocha Ice-Cream recipe for the holidays ... I'll post it soon ...
Cheers
David.