Add Reese’s liners or cupcake liners to cupcake tin.
Melt chocolate over the stove on low heat or in the microwave, stirring every 30 sec until liquid. Using a spoon, transfer chocolate to each liner, filling only the base. Once all are filled, move to freezer to harden while you make the filling.
Whisk together pb, maple syrup, coconut oil and vanilla extract in medium-sized bowl. Pour in collagen, if using, and coconut flour, & stir thoroughly.
Form dough into smaller, 1-inch thick balls and press together with your palms to flatten into a circle. Place filling over the hardened chocolate in the liners, thin enough so that it doesn’t pass the top of the liner and enough room on the outside so the chocolate can fill the space.
Once all dough has been added (you’ll probably have some leftovers), pour remaining chocolate over the top until it’s level. Place back in fridge/freezer for 5-10 min to harden.
Best when fully defrosted-- Enjoy! *store in airtight container in fridge/freezer for up to several weeks.