My son was helping me make muffins last night.
"Okay," I said. "We need two cups of flour. Can you get some and pour it into the bowl?"
"I'm on it," he said.
Out of the corner of my eye, I saw him scooping some white stuff out of a bag that was on the counter. The bag looked a little bigger than a typical four bag. I figured I'd better check this out. I walked over and read writing on the bag: Easy Sand 20 Joint Compound. It was the stuff my husband had been using to spackle the ceiling.
"Uh, dude. This isn't flour," I said.
He looked puzzled. "It's not?"
"No. If you use that, the muffins will be rocks."
All I can say, is that I'm glad I caught it before the rest of the ingredients went in!