Step 1

Preheat the oven to 190ºC/170ºC Fan and Line 2 Large baking trays with parchment paper.

Step 2

Melt the butter slowly until it is fully melted, leave to cool for a couple of minutes.

Step 3

Once cooled, beat in both the light brown soft sugar and granulated sugar until they are all thoroughly combined.

Step 4

Add the egg, egg yolk and vanilla extract and beat the mixture until the mixture becomes much lighter in colour, is smooth, and has increased in volume.

Step 5

Add the dry ingredients (plain flour, bicarbonate of soda, and sea salt) and beat again until smooth.

Step 6

Fold through the chocolate chips.

Step 7

Using a 5cm Scoop, portion the cookies onto the trays (I did 6 per tray).

Step 8

Bake the cookies in the oven for 12-13 minutes for softer chewy cookies, OR 15 minutes for soft/crunchy cookies.

Step 9

Leave the cookies on the tray for 5 minutes after they have finished baking, and then transfer to a wire rack and continue to cool! Enjoy!