Slice bananas into 1-inch pieces and place them on to a clean baking sheet.
Top each piece of banana with peanut butter, placing peanut butter on banana in equal amounts. This may get a little messy, so work slowly.
Gently place a second banana piece on top of the peanut butter covered banana. Place in the freezer.
These have a tendency to move around a bit, so I suggest checking them half way through and making sure they are all lined up.
After two hours, check to make sure they are frozen.
If the frozen peanut butter banana bites are ready, melt chocolate in the microwave.
Remove melted chocolate from the microwave and stir in coconut oil. It will be thinner and glossy.
Using a fork, quickly coat each banana bite completely with chocolate. Place coated bites back on to the baking sheet.
While the chocolate is still melted, sprinkle with just a tiny bit of flaky sea salt.
Place the chocolate covered bites back in the freezer one more time. Freeze for 1 hour.