Preheat the oven to 350 degrees F
In a large bowl, cream together butter and sugars until light and fluffy
Beat in eggs and vanilla until smooth
In a small bowl, whisk together flour, baking powder, salt and baking soda
Gradually add flour mixture to wet mixture, scrape down the sides of the bowl after each addition
Stir in chocolate chips, reserving a handful for the top
Spread the dough evenly in a 10 inch skillet and scatter the reserved chocolate chips on top
Bake until the center is cooked through, about 25-30 minutes or until a toothpick inserted comes out clean
Remove from oven and cool slightly
Serve warm with vanilla ice cream and toppings if you like