Start by melting your butter then pour this into a large bowl
Add the cocoa powder into this and whisk
Now add both sugars, whisk this, then whisk in the the 2 egg yolks and the whole egg
In a separate bowl, mix together the flour, salt, baking soda and baking powder
Add this into the other bowl and mix until a dough forms. now mix in the chocolate chunks
Divide the dough into 100g pieces, roll these into balls then add them onto a tray and leave them in the fridge for an hour
After around 40 minutes, you can pre-heat your oven to 180c/350f
Once the cookie dough balls have chilled for an hour, add them onto a large baking paper lined tray, making sure to leave gaps in between them so they have room to spread
Bake these for 18-20 minutes. after 10 minutes, i took the tray out and slammed it down on my counter a few times just to make them a little flatter, just like the mcdonald's ones. then put them back in to oven and bake for the remaining time
Once they're baked, let them cool on the tray for 5 minute before trying to pick them up and then that is it!
