It irritates me when people get the simplest punchlines WRONG.
The correct punchline is:
"Piece of cake!", not "A piece of cake".
When someone says "can you do xyz for me?" You say "Piece of cake" not "A piece of cake".
The "A" ruins a great gag, well done.
The correct punchline is:
"Piece of cake!", not "A piece of cake".
When someone says "can you do xyz for me?" You say "Piece of cake" not "A piece of cake".
The "A" ruins a great gag, well done.