Preheat oven to 350 degrees. Cream butter and sugars together until light and fluffy. Add pudding mix. Beat in eggs, one at a time, and mix well after each egg. Add vanilla and mix.
Combine the flour and baking soda and mix. If the dough seems too sticky, you can add flour 1/8-1/4 cup at a time until you can form it into balls. Stir in chocolate chips.
Form into balls and press down slightly to flatten the dough once on the pan. Bake for 8-10 minutes or until cookies just appear 'set'. Allow to cool on the pan for severeal minutes before removing to a rack.