TIFU by messing up food I was cooking at a friends house.

I like to cook for my friends, sometimes at my house and sometimes at theirs. I have a friend couple that I would cook for probably once a month, I would bring something over, cook and clean up after myself. We would play video games and smoke. It's been a few years since I have been over to cook for them because of the last thing I cooked for them. They chose Taquitos (White people taquitos so pretty much flautas) ANYWAYS... I was seasoning the food at the very end before I put the filling in the tortillas; they have an automatic salt and pepper shaker and when I went to use it the batteries died. I thought to myself that's not even a problem! They have a little vial of mixed salt and pepper, I uncorked the patrone bottle and shook it into the food not even thinking about trying the seasoning to make sure.

As soon as I got done shaking the seasoning onto the food I had a bad feeling so I called Kitty over to the kitchen and asked her what was in this bottle. She broke out into laughter and told me it was.... SAND! From her trip to the coast. I was horrified. I can't believe I just put sand in the food! They assured me it was fine and even had me finish making it. I did scoop as much of the sand out of the food as I possibly could but.... it was still in there. They are true troopers because they still ate it and made some jokes but were otherwise unbothered.

I have been too embarrassed to go back and cook for them. I do see Red sometimes and we always have a good laugh about it. I tell them I'm gonna come cook again for them and I will eventually.... but oof.

TL;DR: I was cooking a meal for my friends and ended up putting sand in instead of salt and pepper.