Be Mine
Castiel handed this to Dean, along with a jar of honey.
The next time Dean looked at the piece of candy, there was an extra "e".
"Change it back," Dean said.
Castiel smiled and happily complied.

Kiss Me
Sam gave this to Gabriel, along with a bag of Hershey's kisses.
"Oh, you know me so well, Sasquatch," Gabriel said, ripping into the bag.

Let's Get Busy
Sam gave Gabriel an epic bitchface when Gabriel handed him this one.
"Does anyone even say this anymore?" Sam asked.
Gabriel held a hand over his heart. "I solemnly swear I did not zap this candy from the 1990s."
"Oh yeah," Sam said, setting the candy on the table, "that totally fills me with confidence."

Miss You
Castiel found this in his trench coat pocket after he returned to Earth, having been away in heaven for some time.

You Rock
Dean was inexplicably upset when he found out that this candy had been retired.

Girl Power
Sam was not amused when Dean left this one on his pillow one year.

High Five
Dean threw this one away, saying, "Only douchebags high five each other all the time."

Angel
"Yes, I am," Castiel said when Dean handed him the candy heart.

Me & You
"You and me what?" Sam asked Gabriel.
"You know."
"No, I don't know."
"Come on, Sam. You know."
"You know what? Never mind."
"Hold out your hand, Sam."

I (heart) You
Sam smiled when the archangel dropped the candy into the palm of his hand.
Of course Gabriel would express his feelings in a candy.