Pulse the Oreo® Chocolate Sandwich Cookies (1 package) in a food processor until they're all fine crumbs.
In a medium bowl, mix Hershey's® Special Dark Instant Pudding Mix (1 package) and Milk (1 3/4 cup). Beat with a whisk or hand mixer until thickened.
Then, fold in Whipped Topping (1 cup) until all is incorporated.
In a medium saucepan, bring the Guinness® Stout Beer (1 can) to a boil on medium-high heat. Boil for 15-20 minutes, or until the liquid is reduced to a 1/2 cup.
Remove from heat and stir in Ghirardelli® 60% Cacao Bittersweet Chocolate Chips (1 cup) until completely melted. Set aside.
In a large bowl, beat Cream Cheese (8 ounce), Butter (2 tablespoon), and Powdered Confectioners Sugar (1/2 cup) with a hand mixer until smooth.
Add in beer mixture and continue mixing until incorporated. To this, add the pudding mixture and gently mix until well blended.
Now take out your shot glasses and start layering. Add about 1 teaspoon of crushed Oreos first, then add about 1 teaspoon chocolate cream mixture and continue layering until shot glass is full, ending with the crushed Oreos on top.