Use Pass, after the Main Cookie's great ability ends, eat 4 Big Coins and finish.

The recorded playtime is about 19 seconds, so calculating efficiency as Coins/playtime results in about 150~160, and depending on map patterns or control differences, more Coins can be earned.

Of course, since the playtime is excessively short, my efficiency doesn't show well, so I recommend using this only when you urgently need a small amount of Coins.