Banana bread fail.

Growing up, my Mom would always make delicious loaves of banana bread. She used my Granny's recipe, and when I was planning on moving out to Utah to live with my aunt, she put the recipe (and others) into a cookbook for me. I have that cookbook in Okinawa, though I've never referenced several of the recipes. Sadly I have not used the hush puppy recipe (also my Granny's), nor the chocolate chip cookie recipe, and up until this weekend, I had not used the banana bread recipe. After learning that Dan liked banana bread (yeah...I didn't know that. Oops!), we bought extra bananas so I'd have enough to make a loaf of Granny's banana bread. They started to get ripe enough right before we were starting our Space-A adventure, so I put them in the freezer so I could use them later. Early one morning, I decided I was going to make banana bread. I took the bananas out of the freezer to thaw and set them in a colander in the sink. Dan hadn't realized I had froze the bananas so he asked if I was going to use them for something. He thought they looked pretty off -- which they did. Brown and thawing out ... they looked pretty yucky. I was excited for Dan to try the banana bread and began mixing everything together. As I was adding the flour (which is towards the end of the recipe), I realized that my measuring cup held 4 cups. I thought I had grabbed one that held 2 cups. Uh oh. I started to think back to when I put the sugar in ... did I fill it up to the top? Or did I fill it halfway? I started to immediately feel bummed - I was pretty certain I had put 4 cups in, which would make the loaf absolutely disgusting. As it was baking, I checked on it often by opening the oven door. I would always get talked to about that when we would bake at home, because I was letting all the heat out. Sorry, Mom! The light in our Japanese oven stays on the whole time it is baking but it is hard to see, so I kept opening the door. Once it cooled, I taste-tested it first. I wanted to be able to throw it out if it was not pleasing to the palate. I didn't want Dan's first taste of the bread that I claimed to be so "delicious" to be the complete opposite. It didn't taste quite right, but it also didn't taste as if I had put two extra cups of sugar in it. I'm not sure where I went wrong, and I'm kind of worried to try the recipe again. I do have another bunch of bananas still in the freezer, so I may give it another whirl. We'll see. If I do, I'll be sure to update and let everyone know how the experiment with. What is your biggest recipe blunder that you've made? Did people eat your dish / dessert before you realized your mistake(s), or did you catch yourself before you served it?