01 - Preheat oven to 325°F. Combine almond flour, cocoa powder, sweetener, melted butter, and salt in a bowl. Stir until crumbly. Spread onto a parchment-lined baking sheet and bake for 8-10 minutes, stirring halfway. Let cool completely, then break into fine crumbs.
02 - Whisk together almond milk, heavy cream, cocoa powder, sweetener, xanthan gum, and espresso powder in a saucepan. Place over medium heat and stir constantly until mixture thickens, about 3-4 minutes. Remove from heat and stir in vanilla. Let cool to room temperature, then refrigerate until chilled and thickened for at least 1 hour.
03 - Whip heavy cream, sweetener, and vanilla using an electric mixer until stiff peaks form.
04 - Layer half the chocolate crumble at the base of a glass dish or individual jars. Spread half the pudding over the crumbs, then half the whipped cream. Repeat layers, finishing with the remaining crumble on top. Chill for at least 1 hour before serving.