Line a loaf tin or small rectangular pyrex container with parchment paper, leaving some hanging over the sides. You can also use silicone molds.
In a small saucepan, stir together the coconut oil, honey, and peanut butter on medium heat.
As soon as it's smooth, add the peanut powder, and the fine sea salt. Whisk until smooth. One tip, you can take it off the burner as needed, whisk, smooth, add stuff, put it back on the burner...I sometimes am not quite prepared and all you have to do is pull it off the burner for a sec.
Cook on medium, continuing to whisk, until it is CLOSE to starting to boil (over 80 C, headed toward 100 C). This will only take a minute or two.
Remove from heat and quickly add the vanilla, coconut flour, and coarse sea salt. Stir together until incorporated, then pour into your prepared tin or mold immediately.
Sprinkle with a little bit of flaky sea salt and refrigerate for at least an hour to let it set, ideally 2-3 hours (you can also freeze for 30 minutes).
Chop into slices and enjoy! It will keep in the fridge for at least a week or two, probably longer (honestly...it's never lasted that long in my house!).