Slice the medjool dates halfway through lengthwise, remove the pits and lay them flat on a parchment paper into a 4 x 4 square so all of the dates are touching sides. Cover with a second sheet of parchment paper and use a rolling pin to flatten them out slightly/ smush them all together.
In a mixing bowl add the vanilla protein powder, peanut butter and milk and stir til smooth. Spoon this mixture onto the dates and spread out evenly. Spread out the peanuts on top.
Melt the chocolate chips in the microwave using 20 second intervals and stirring in between each one, careful not to burn the chocolate. Or use a double boiler method on the stove. Once completely melted smooth, pour the chocolate over the peanut layer and spread it out evenly. Sprinkle coarse sea salt on top.
Place in the freezer for at least 30 minutes to harden before slicing into 6 even bars. Store in the freezer. Let sit out for 5 minutes before eating for best texture.