Preheat oven to 350F. In a large bowl mix flour, baking soda, baking powder, and salt together.
In a separate bowl, add the melted butter, 'eggs', vanilla and sugar. Cream these together.
Next, add the flour into the creamed ingredients in 1/2 cup increments. Mixing well each time.
Once all the flour is added, stir in chocolate chips and any other inclusions.
Grease a 13x9 pan and spread the mix evenly in it.
Bake for 30 minutes. Allow to cool fully before cutting into long rectangles.