For afternoon rides, which tend to be shorter (30 miles or less,) whatever I had for lunch is good enough.

For weekend morning/longer rides (usually 50 miles +), I've found coffee and a banana while I'm getting everything together and into the car and then a bagel with cream cheese while finishing the coffee in the car getting to the start is perfect for the typical first 30 miles before a rest stop. Usually try to buy one of those mini Fig Newton packages when refilling water bottles at that point - that gets me through the next 20-30 miles, repeat.