Ace gooey cookie recipe!

How to make cookies like the fresh ones you get in bakeries or supermarkets! :)

You will need
A mixing bowl
A wooden spoon
A sieve
A set of scales
A baking tray or two
Grease proof paper
Wire rack

Ingredients
100g  unsalted butter (softened)
125g light muscovado sugar
Yolk from 1 med egg
125g plain flour
30g cocoa powder
tsp bicarbonate of soda
100g bar milk chocolate roughly chopped
2 baking trays, lined with grease proof paper

1. Pre heat oven at 190°C.
2. chuck everything but the chocolate in and mix it up (mix it well making sure there are no lumps of flour.
3. Divide the mixture into 10 and roll each portion into a ball put it on the tray 3-5cm's away from the next one (they double in side in the oven) and then press them to flatten them to about 1.5cm thick. 
4. Bake for 10-12 mins until risen and cracked but still a bit soft and gooey.
5. Cool for 5 mins, then transfer to a wire rack to cool.