Chocolate Peanut Butter Icebox Cake

Name: Chocolate Peanut Butter Icebox Cake
Total time: 30 min
Yield: 8
Ingredients: 4 ounces cream cheese, at room temperature; 1 cup smooth peanut butter (I use Skippy All Natural, No Need To Stir); 1 cup confectioners' sugar; 2 teaspoons vanilla extract; Pinch salt; 2 cups cold heavy cream; 50 Nabisco Famous Chocolate Wafers, from one box (see note); Cocoa powder, for dusting; ¼ cup unsalted dry roasted peanuts