Soft, chewy chocolate chip cookies with slightly gooey centers. This single recipe includes ingredient portions for 1 dozen, 2 dozen, or 3 dozen cookies.
Do not overbake. The cookies should still look slightly doughy when they come out of the oven; they will finish setting on the hot baking sheet. For a convection oven, reduce the temperature by 25°F. For the 1- and 2-dozen batches, beat an egg and measure the amount listed for best accuracy.