I stop about 25 miles into my daily ride and eat an energy bar and wash it down with water, but then I'm not trying to keep up a massive cadence. I do keep up a decent pace on my rides though, then just deduct the time it took to eat the bar (and feed a squirrel buddy) from my overall time in those rare instances I'm keeping track.

If I were really aiming for personal speed records though I'd simply skip eating at all during the rides (up to maybe 40 miles), instead I'd eat something like a PB&J shortly before heading out and then just hammer out the miles.