Water, two 24 oz Polar bottles, one with Nuun tablet. Couple table spoons of local raw honey added to the Nuun bottle is rocket fuel! Often I take those little frozen BP&J sandwiches made for kids. (Crustables?) Lately I've been eating a lot of dates and started taking them on my rides. Eating a couple every 45 mins - 1 hour is working well for me. Eating the dates, I've been tired from the miles but full of energy even up to the end. If I know it's going to be over 50 miles, I may add some peanut butter cheese crackers. Sometimes I want something salty. And I'll add a 3rd water bottle. If it's hot, I plan on refilling those bottles.
Other times I'll take a gel. Maybe a Clif bar which I pinch off a bite every now and then.