In a bowl, add the brown and white sugar.
In a heavy sauce pan, add the butter and let it melt.
Add the melted butter into the bowl with sugar and let it butter and sugar mix thoroughly.
Add egg and vanilla into this mixture.
Sift the flour, baking powder and baking soda into the wet ingredients and mix thoroughly.
Fold in the chocolate chips into cookie dough.
For a typical cookie, you scoop out the cookie dough balls and let it chill overnight in the fridge and bake the next day.
But for this skillet cookie, you can just do it the same day.