Here is the "Ultimate Guide to Chocolate Cookies", which is a wonderful reference. For a basic recipe, and a few of my personal insights, follow the instructions below.
Makes about 16 large cookies. Recipe can easily be doubled.
2 cups flour
1 tsp baking soda
1/2 tsp salt
8 tbsp butter
1/2 cup white sugar
3/4 cup brown sugar
1 egg
1 tbsp vanilla
12 oz semi sweet chocolate chips/morsels
Cream butter and sugars. Add vanilla and egg, beat until
fluffy. Whisk together flour, baking soda, salt. Add to butter/sugar mixture.
Stir in chocolate chips.
Refrigerate dough for 24 hours.
Remove from fridge 15 minutes before shaping.
Preheat oven to 325˚F.
Use about ¼ cup dough for each cookie. Space several inches
apart.
Bake for 10-12 minutes, or maybe more, checking every couple
minutes (yeah, it’s a pain, but every oven is different) until the cookies are
relatively flat on top and not gooey in the center, but still slightly soft to
the touch.