Preheat oven to 400 ℉. Line a cookie sheet with parchment paper, then set aside.
In a large mixing bowl, use a wooden or silicone spoon to stir egg, sugar and peanut butte until well combined. Add chocolate chips and stir to incorporate.
Using a 1-tablespoon scoop or small spoon, portion dough into 1-inch balls, placing them 2 inches apart on the prepared baking sheet.
Gently press the tines of a fork down on each dough ball, moving it in one direction, then the other direction, creating a crisscross pattern.
Bake cookies in preheated oven for 8 minutes then remove them and let them sit on the pan for about 5 minutes before enjoying.
Notes
Dough Ball Size - It’s ok if you make the dough balls a little smaller or a little larger, just keep them as close in size as possible. Otherwise, they won't cook evenly.
Use cooking spray to prevent sticking. The dough will be a little sticky when rolling it into balls. You can spritz your hands with nonstick spray and this will help in handling it. You can also spray the fork before making the crisscross pattern in the dough.
Flatten the dough if you aren't going to create a pattern. If you don’t flatten the balls of cookie dough a little bit before baking, they won't spread out evenly.