easy as pie
- (simile, colloquial) Very easy.
1910, Zane Grey, The Young Forester:
- "Easy as pie," replied he, eagerly. [..] What Dick called easy as pie was the hardest work I ever did. I lay flat on my back, bound hand and foot, and it was necessary to jerk my body along the log till my hands should be under the knife.
2004, Girls Aloud, Love Machine:
- Come make my dreams, honey hard as it seems, loving me is as easy as pie.
- See Thesaurus:easy