The conversation went like this...

Part 1: (took place at 10:45 p.m. last night)

Aiden: I want chocolate.
Me: It's really late and you already had a chocolate covered pretzel. You can have another one tomorrow.
Aiden: Ok, Mommy.

Part 2: (took place at 7:00 a.m. this morning)

Aiden: Good morning, Mommy!
Me: Good morning, Aiden.
Aiden: I want chocolate.
Me: It's too early for chocolate.
Aiden: But you said so.
Me: I did say so last night, but I didn't mean you could have chocolate for breakfast. How about toast?
Aiden: (long pause) Ok, Mommy.

I can't believe that he remembered. His memory is better than mine.