Buy the same pastry from four shops and hold a taste-off

Pick one pastry your area does in multiples — croissant, sausage roll, samosa — and buy it from four different counters on one walk. No tasting until all four are lined up on the same surface, labelled, receipts as evidence. Then rank them, last place to crowned winner. The shop you were certain would take it almost never does, which is the only justification you need for carrying a warm paper bag across town.