CHOC-CHIP COOKIE CUPS

• 150g unsalted butter, softened, plus extra for greasing • 100g light brown soft sugar • 100g caster sugar • 1 British Blacktail Free Range Medium Egg • 1 tsp vanilla bean paste • 250g plain flour, plus extra for dusting • 1 tsp bicarbonate of soda • 1⁄2 tsp fine salt • 360g bar Cadbury Dairy Milk