In a medium bowl, mix nut butter, maple syrup, coconut flour and vanilla.
Drop the nut butter mixture into small blobs on a glass dish.
Flatten the top of each blob with a spoon.
Place glass dish in the freezer for 20-30 minutes.
Melt the chocolate bar in a saucepan over very low heat, stir frequently.
Transfer melted chocolate to a bowl.
Dip each nut butter blob into chocolate, making sure to coat evenly.
Transfer back to dish and sprinkle with coarse sea salt.
Place glass dish back in freezer for 1 hour.
Keep in fridge or freezer until ready to enjoy!