It will probably be the best you've made!

Physical proportions are important in baking for the physical outcome more than for taste. The physical result would have been similar had you put in an egg's liquid equivalent in fluid ounces of too much water (ie, too much liquid of what, maybe 1.5 - 2 ounces) except, as others have said, it will be richer. So, maybe a bit wetter than otherwise and maybe a bit richer in taste.

The extra egg will cook through in the baking process, not making the finished cake wetter, but more dense. Think of how an egg hardens when boiled. It may not even be noticeable in a heavier batter.

An interesting eggs-periment! (sorry, couldn't resist.) Seriously, let us know about the result. Did you notice much of a difference, etc.

I think it will be fine. A recipe calls for an egg. What size do you use? Large, Extra Large etc. You use what is in the fridge!

Test as usual. It will interesting if it needs to be cooked longer.

I think the only thing you can do in this case is send it to me and I'll handle it. Send me a message for pertinent delivery address.

LOL, Elmer.

Good one Elmer!

Thanks for all the replies. I really need to make sure I have my reading glasses on next time. The banana bread came out fine. Maybe denser if anything. But I'll stick to 1 egg next time.

If I don't have my reading glasses on, I have to have DD or DS tell me what the directions are on boxes...The other day I was asking yet AGAIN what the temp was on the frozen tilapia box....I decided to grab a sharpie and write it in big numbers on the box!!

Time for kitchen readers :-)

I have readers all over the house. Every now and then I have to round them up because I set them down wherever I am.

"Added 1 too many eggs to recipe...what to expect?"

..... me over to take part in the bread. :-)

Sharpie notes are good. I write "walnuts and raisins" on spice cake boxes to be sure I don't forget to put them in when I make it. Other notes on other pantry goods. "MORE" alerts me that supply is good. Crib notes :)

I keep a magnifying glass on the refrigerator for those times it's needed. Very handy. It's one with a light on it too.

I definitely need a magnifying glass at home. Several times even with readers I can't see teeny tiny print on things.

always, when I need to see very small things clearly, especially like serial or MAC address numbers on the back or bottom of various electronic devices, I take a photo of it with my phone. Then I can look and even zoom in (whether on the phone or after I send an email to myself to see it on a PC) and see it clearly. No matter how small, it seems to always work. When the item is real small, it may take a few tries to get the focus right.

Just this weekend, I was trying to fix a loose towel bar and i couldn't figure out what kind of head the very small tightening screw inside a small hole would take. It was too small and too awkward for me to see. I tried a normal screw driver and also a Phillips, no luck. I took a photo, blew it up, and saw it took a square head drive. Fixed in just a few minutes. Couldn't have done it without the image.