Doddle

n.joyful, capableplayful

What it means

In British informal English, a task that is pleasantly easy to do.

Reach for it when describing a task that becomes almost effortless with the right preparation or tool

With every cable labeled, setting up the projector was a doddle.

playful
breeze
when a task feels light and effortless
not when Breeze is more widely understood but can sound boastful when others found the task difficult.
playful
piece of cake
when friendly, familiar speech should emphasize ease
not when Reports, instructions, and dignified praise need a less casual expression.
playful
snap
when a task can be completed quickly with little thought
not when Snap may suggest speed and is unclear outside the phrase a snap.
everyday
cinch
when success or ease feels virtually assured
not when Cinch is chiefly North American and can imply certainty rather than simple execution.
everyday
walkover
when a contest is won with almost no resistance
not when Walkover fits competition and is wrong for an ordinary household or technical task.
literary
child's play
when the task is simple compared with a harder one
not when Child's play can belittle another person's effort or invoke children unnecessarily.