There are a few crucial steps to baking the chewiest, tastiest chocolate chip cookies. First, skip using chips and opt for chunks. Second, instead of using just one type of chocolate (like semisweet), use a mix of semisweet, milk, and dark chocolate. Third, take the time to allow the cookie dough to rest overnight in the refrigerator. Yes, we know it's a pain, but doing so will yield a cookie with a more complex flavor and delicious toffee notes. Lastly, use an ice cream scoop to portion the cookie dough onto the baking sheet. This will produce even-sized cookies every single time. Follow these simple steps, and you'll be rewarded with a cookie that's crisp and chewy on the outside and gooey on the inside!