easy as pie 

Very simple; extremely easy.

1) The job was easy as pie, and we finished up an hour early.
2) You want Mom to give you fifty dollars? Easy as pie. Just tell her you need to buy some new shoes.

Etymology: 'Pie' is a tasty, sweet dish that is easy to make, and even easier to eat.

easy as pie by silverbridge September 22, 2006

as easy as pie 

To be very easy

"Oh, come on! Even a child could do that, it's as easy as pie. "

as easy as pie by LIsa llLUI March 22, 2017