1-Step 1: Prepare the Brownie Base Begin by baking the brownie mix according to package directions in a 9×13 inch pan. Be careful not to overbake the brownies, as they will continue to cook slightly after being removed from the oven. Slightly underbaked brownies will remain moist and tender, which is perfect for this dessert. Once baked, allow the brownies to cool completely before proceeding. Warm brownies will melt the whipped topping and cause the layers to collapse.

2-Step 2: Cut and Prepare Components Once the brownies are completely cool, cut them into 3/4-inch pieces. These uniform cubes will make layering easier and ensure each serving contains a perfect ratio of ingredients. While the brownies are cooling, prepare your other components by halving the mini peanut butter cups. Reserve about 1/3 cup of the halved peanut butter cups for the final garnish.

3-Step 3: Create the Peanut Butter Pudding Mixture In a large mixing bowl, whisk together the 4 cups of 2% milk and the two 5.1-ounce packages of instant vanilla pudding mix. Continue whisking for about 2 minutes until the mixture begins to thicken. Then add the 1 cup of smooth creamy peanut butter and 4 teaspoons of vanilla extract, mixing well until completely incorporated and smooth.

4-Step 4: Incorporate the Whipped Topping Gently fold in 1 1/2 cartons of the thawed whipped topping into the peanut butter pudding mixture. Be careful not to overmix, as you want to maintain some of the lightness of the whipped topping. The remaining half carton will be used for the top layer of the trifle.

5-Step 5: Assemble the Layers In a large trifle or serving bowl (approximately 14-cup capacity), begin layering your ingredients:* Start with one-third of the brownie pieces at the bottom of the bowl* Follow with one-third of the halved peanut butter cups* Add one-third of the peanut butter pudding mixture* Repeat these layers two more times

6-Step 6: Add the Final Touches Top your trifle with the remaining whipped topping, spreading it evenly to cover the entire surface. Sprinkle the reserved peanut butter cups over the whipped topping as a garnish. For an even more impressive presentation, consider adding some additional chocolate shavings or a drizzle of chocolate sauce.

7-Step 7: Chill and Serve Refrigerate your trifle until thoroughly chilled before serving, ideally for at least 2-3 hours. This chilling time allows the flavors to meld together and the layers to set properly. The dessert is best served cold and can be prepared a day in advance, which actually allows the flavors to develop even further.