Middle Swan batted first and opener Brandon Ghirardi got off to a good start with a couple of early boundaries.
The score quickly raced to 17, but that was about as good as it got for Middle Swan, as four wickets fell in just four overs.
Muchea bowler Brendan Hughes triggered the Middle Swan collapse while Kyle Mackey, at the other end, continued his brilliant form to also capture three wickets and leave Middle Swan reeling at 4/17.
Batsmen Gary Clarke and Fred Payne provided some resistance for Middle Swan with a middle-order partnership of 27.
After drinks, the wickets came thick and fast as Middle Swan were bundled out for 59 in just 27.5 overs.
It was an all-round excellent display of bowling and fielding by Muchea, with the pick of the bowlers Kyle Mackey (3/13), Steve Balcombe (2/2), Jayden Andrews (2/18).
Muchea had a shaky start in their run chase, falling to 3/26, but were able to successfully negotiate the target without any further loss of wickets and cruised to a seven-wicket win in just 14.3 overs.
Dale Payne made 22 while Darren Nelson hit the winning run for Muchea in his knock of 12.
It was the perfect way to cap off a brilliant year for Muchea, who produced their best performances when everything was on the line.