Line a 9x9 or 9x13 inch baking dish with parchment paper with overhang.
In a food processor, add dates, peanut butter, oat flour, honey, vanilla, protein powder, and salt. Process 2–3 mins until crumbly.
Add water gradually until a thick dough forms.
Press the batter firmly and evenly into the prepared pan.
Melt chocolate chips and coconut oil in microwave in 15-second bursts, stirring until smooth.
Pour melted chocolate over the dough, spread evenly, and sprinkle with sea salt.
Freeze the pan for 30–60 minutes until firm.
Lift out with parchment and slice into 16 bars.
Store bars in an airtight container in the fridge up to 7 days or freezer up to 3 months.