something to write digits withsuch as a batch of cashew cream (6 tablespoons cashews and 3 tablespoons of water) blended extra-smooth and maybe even sifted through a strainer so that it won't clog the decorating tip. (For the pie in the picture, I used homemade frosting, but in the refrigerator the mousse dissolved it, so I recommend decorating with cashew cream, not frosting)
Instructions
Make the chocolate brownie crust according to its directions.
Make the chocolate mousse according to its directions.
Place the mousse in the pie crust and carefully smooth it out flat with a spatula.
Use your favorite approach to writing with frosting to write digits of pi on the pie.
Refrigerate for a few hours to let the filling firm up. (It is hard to wait!)