Eric Lanlard's chocolate chip cookies recipe

Ingredients

• 250 g plain flour
• 0.5 tsp bicarbonate of soda
• 0.5 tsp salt
• 170 g unsalted butter, melted
• 200 g muscovado dark brown sugar
• 100 g golden caster sugar
• 1 tbsp vanilla extract
• 1 egg
• 1 egg yolk
• 325 g chocolate chips