Would have to be an apple pie.
Shocking, I know.
I was living at home at the time. Must have been about 15 or so. I went to the cupboard where my mom would always have a fresh Costco apple pie sitting. I decided I was hungry for some pie.
Cut me a slice of it. Added copious amounts of whipped cream. It was looking bomb.
And I gobbled that fucker up.
Mom came home and I was like "I had some apple pie." in response to her asking me about dinner plans.
Her face went white. "Not the apple pie in the cupboard!" It was then that I noticed the pie had moved locations from the cupboard to the staircase... next to the trash to be taken out. Um...
"Why?"
"Lemme show you..."
She lifted the crust off of the top with a fork... and inside it was bright neon blues and greens. Completely covered in mold.
And that was gross.