Step 1: Make the Crust

1. Preheat your oven to 350°F (175°C).
2. In a mixing bowl, combine the almond flour, cocoa powder, erythritol, melted butter, vanilla extract, and salt. Mix until a dough forms.
3. Press the mixture into the bottom and up the sides of a 9-inch pie pan evenly.
4. Bake the crust in the preheated oven for 10–12 minutes. Remove and let it cool completely.

Step 2: Prepare the Filling

1. In a large mixing bowl, beat the softened butter and erythritol together until light and fluffy.
2. Mix in the vanilla extract and cocoa powder until well combined.
3. Add the eggs one at a time, mixing well after each addition. Beat the mixture for about 5–7 minutes until it becomes light and fluffy.

Step 3: Assemble the Pie

1. Spread the chocolate filling evenly into the cooled pie crust.
2. Refrigerate the pie for at least 1 hour to set.

Step 4: Make the Topping

1. In a mixing bowl, whip the heavy cream, erythritol, and vanilla extract until soft peaks form.
2. Spread or pipe the whipped cream over the chilled chocolate filling.
3. Optionally, garnish with chocolate shavings or a dusting of cocoa powder.

Step 5: Serve

1. Cut the pie into slices and serve chilled.