Preheat the oven to 350F degrees.
Spray a 9 inch pie pan or 9 inch round cake pan with non-stick spray & set aside.
In a large bowl whisk together the flour the flour, baking soda, pudding mix & salt.
In a separate large bowl beat together the butter and sugars on medium speed until light & fluffy.
Mix in the egg and vanilla extract.
Mix in the flour mixture, followed by the milk.
Turn off the mixer and stir in the chocolate chips.
Spoon the mixture into your prepared pan & press down the cookie dough.
Bake for about 25-30 minutes until the top looks set. If the top starts to get too brown before the cake is done, tent a piece of aluminium foil and place it over the top.
Remove from the oven & allow to cool on a wire rack.