In a double boiler or in the microwave, melt together chocolate chips and coconut oil until completely smooth and combine. Use a spoon to scoop the mixture into a heart silicone mold then place in the freezer to freeze for at least 2+ hours. I froze mine overnight to be safe.
Once chocolate is hardened completely, pop the hearts out of the mold and place on a plate and keep in the freezer while the cookies bake.
Preheat oven to 350 degrees. Cut cookie dough into 8-10 cookies, shape them into round shapes then place on a parchment lined baking sheet to cook for about 10 minutes, until they are slightly browned on the edges.
Pull cookies out of oven and hearts out of the freezer. You’ll want to have a plate ready to go for these cookies to go on so they can go into the freezer right away. While the cookies are still warm, press a heart into the middle of each cookie then quickly put them in the freezer to set for at least 2 minutes or so. This will keep the chocolate from melting into the cookie and becoming a giant chocolate blob instead of a heart.
Store in fridge but I highly recommend microwaving for less than 30 seconds before eating because it warms the cookie and softens the heart just a tad!