If they were covered with semi-sweet dark chocolate they'd be good. More antioxidants, less sugar.
Washing any heavy food that's not unnaturally dehydrated down with water dilutes digestive enzymes and thereby spoils digestion.
Also, sugar with heavy, slow digesting foods is a bad combination. The sugar sits in the stomach and ferments, rather than being quickly absorbed in the small intestine, as it should be. And that is the usual cause of "heartburn," not too much stomach acid. Often it's too little stomach acid, which contributes to fermentation of the poorly digested food in the stomach, which in turn bubbles up to the esophagus.