Add pb, maple syrup, and coconut flour to a bowl and mix until well combined. Take tsp balls of the dough and press into a silicone reese’s cup mold. Press down each cup until flattened. In a separate bowl, melt chocolate with coconut oil. Drizzle chocolate evenly over each pb cup. Top with flakey sea salt (optional), and place in fridge or freezer until set (1 hr in fridge or 30 min in freezer). Pop the cups out of the mold & enjoy!