Crust: In a bowl, mix almond flour, cocoa powder, sweetener, and salt. Stir in melted butter until combined. Press into a 9-inch springform pan.
Peanut Butter Layer: Whip half the cream until stiff. Beat cream cheese until creamy, then mix in peanut butter, sweetener, and vanilla. Fold in remaining cream and spread over crust. Chill.
Chocolate Pudding Layer: Heat heavy cream and almond milk until simmering. Whisk eggs in a bowl, then temper with hot cream. Return to heat, add cocoa, and whisk until thickened. Stir in glucomannan, butter, and vanilla. Cool, then spread over peanut butter layer. Top with brownie bites and refrigerate for 3 hours. Slice and serve.