In a large bowl, cream together sugar, butter and vanilla, until smooth and creamy
Beat in eggs and molasses until fully incorporated
Add half the flour, all the baking soda and salt and continue beating on low speed
Add remaining flour and beat on low until flour is just incorporated into the dough.
Fold in chocolate chips.
Divide dough evenly into 2 portions and fill prepared pans, spreading dough out to the edges on the pans
Bake in preheated oven for 35-40 minutes or until centre of cookie is cooked. Press the back of a large spoon lightly in centre of cookie. If it sinks and comes out gooey, the cookie is not ready yet, bake additional 5 minutes and check again.
Remove from oven and cool in pan for 5 minutes before removing from pan.
Cut into 8 equal slices and serve warm.