Preheat oven to 350°F. Line a baking sheet with parchment paper.
Place the peanut butter cups in a food processor and pulse them until they are smooth. Add the egg and pulse until combined.
Using a medium-sized cookie scoop, form dough balls and place them on the baking sheet. Press each cookie with your hand so they are a thickness of ½-inch thick. Top each cookie with a sprinkling of sea salt, if using.
Baking the cookies for 15 to 17 minutes or until the edges start to crisp. Cool the cookies for 15 minutes on the baking sheet before transferring to a baking rack.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.