01 - Line a baking sheet with parchment paper and set aside.
02 - In a medium bowl, combine creamy peanut butter, Greek yogurt, maple syrup or honey, and vanilla extract. Stir until completely smooth and well blended.
03 - Scoop heaping teaspoons of the mixture onto the prepared baking sheet, spacing them slightly apart to form approximately 24 small mounds.
04 - Place the baking sheet in the freezer for at least 2 hours, or until the bites are completely firm and solid.
05 - Near the end of the freezing time, combine the chopped dark chocolate and coconut oil in a microwave-safe bowl. Microwave in 30-second intervals, stirring between each, until completely smooth and glossy.
06 - Remove the frozen bites from the freezer. Using a fork or dipping tool, dip each bite into the melted chocolate, allowing any excess to drip off. Place each coated bite back onto the parchment-lined baking sheet.
07 - Immediately sprinkle the top of each coated bite with flaky sea salt before the chocolate begins to set.
08 - Return the baking sheet to the freezer for another 10 to 15 minutes, or until the chocolate coating is firm to the touch.
09 - Transfer the finished bites to an airtight container and store in the freezer for up to 1 month. Serve directly from the freezer or allow to thaw slightly for a softer texture.