Put the fruit, crumbs, mixed spice, mincemeat, treacle, orange zest and juice and brown ale in a food processor and blitz for a few seconds.
Grease four microwave-proof teacups with butter. Place a round of greaseproof paper in the base of each cup.
Divide the mixture between the cups and cover with a larger round of greaseproof paper.
Microwave two puddings at a time at 600 watts for 8 minutes.
Leave the puddings to stand for 5 minutes before turning out and serving decorated with holly leaves.