These cookies baked for 12 minutes are very soft in the center when you take them out, and may fall apart if you remove them from the cookie sheet right away. If you want a firmer cookie, you can bake them for closer to 15 minutes.
Store the fully cooled cookies in an air-tight container kept at room temperature for up to 5 days.
Feel free to swap out the semi-sweet chocolate chips for any flavor you prefer. White chocolate, peanut butter, butterscotch, dark chocolate, peppermint or mint chocolate chips all work wonderfully here. You can even chop up some Andes mints, Reese's peanut butter cups, or toss in some M&M's in place of chocolate chips.