In a chilled bowl, whip the heavy cream until stiff peaks form.
Separate the cream into two separate bowls.
In one bowl, mix in the powdered peanut butter and one teaspoon of stevia.
In the second bowl, mix in the unsweetened cocoa powder with the remaining stevia.
Alternate adding layers of the peanut butter and chocolate mixtures until all is used.
Note: Serve chilled and store in the fridge.