1. Whisk together instant chocolate pudding mix with milk in a medium mixing bowl for 2 minutes. Refrigerate for at least 10 minutes or up to overnight.
2. When ready to serve, chop up prepared brownies into small bite-sized pieces. Alternating between chopped brownies, chocolate pudding, quick peanut butter mousse, whipped cream, and chopped peanut butter cups, layer your trifles, dividing between 6 to 8 small dessert glasses. Alternatively, layer one large family-style dessert trifle in a large bowl.

    For Quick 2 Minute Peanut Butter Mousse

1. Place all ingredients in a food processor and blend until very smooth and fully incorporated. Pour mixture into a bowl and place in refrigerator for at least 30 minutes (up to overnight) to allow mousse to firm up a bit.

    For Whipped Cream

1. In bowl of stand mixer or in a medium mixing bowl fitted with an electric hand mixer, beat cream, powdered sugar, and vanilla on medium/medium-high speed until stiff peaks form.