Line an 8-inch springform pan or pie dish with parchment paper and set aside. (Note: This pan size is smaller than a traditional 9-inch pie plate. If you use a traditional pie dish, the resulting pie will be thinner than what you see in these photos.)
To prepare the crust, combine all of the ingredients in a large mixing bowl and stir well to create a uniform dough. Press the dough evenly into the bottom of the lined pan and set aside.
To prepare the filling, combine the four ingredients in a blender, and blend until completely smooth and silky. You may have to stop and scrape down the sides a few times to get the batter very smooth and evenly mixed. (Alternatively, you could probably use a hand mixer to combine these ingredients, as long as they get whipped together very well-- mixing by hand doesn't work as well.) Pour the filling over the top of the crust, and use a spatula to smooth the top. Place the pie in the freezer to set until firm, about 4 to 6 hours.
Once the pie is firm, prepare the chocolate topping. Combine the coconut oil, maple syrup, and cocoa powder in a small bowl and whisk well to combine, creating a smooth chocolate sauce. (If your ingredients are cold, this mixture will clump, but it will become smooth again when gently warmed.) Use the parchment paper to easily remove the pie from the pan, then drizzle the chocolate over the top. When the chocolate touches the cold pie, it should solidify pretty quickly-- like a "magic shell" topping you'd use on ice cream. Allow the pie to sit at room temperature for 15 minutes, to make it easier to slice and serve. Store any remaining pie in the refrigerator for up to one week. (If you freeze the pie, it will be too firm to serve right away.)
*I used salted peanut butter and still felt the 1/4 teaspoon of salt was needed to balance the sweetness in the peanut butter filling. If you use unsalted peanut butter, you may want to add more salt, to taste. Since you can taste the filling as you go, your pie will taste exactly the way you'd like it to.