Melt the butter in a saucepan on slow flame. Keep melting till the color of the butter changes from yellow to a light brown shade. There will be dark grits at the bottom. Switch off and allow to cool. Strain.
Preheat oven to 180 degrees. Grease an 8 inch cast iron skillet and set aside.
Sift together the flour, baking powder, baking soda along with the salt and set aside.
Beat the eggs and sugars till fluffy. Add the melted butter and vanilla essence and beat.
Now add the dry ingredients and the chocolate chips and fold in till well combined.
Spread out on the prepared skillet. Bake in the preheated oven for 25-30 minutes till the top looks settled.
Cool slightly and enjoy with a big scoop of ice cream and chocolate sauce.