Step 1: Preparing the Oreos

To start, you’ll need to crush the Oreo cookies into small crumbs. This can be easily done using a food processor. If you don’t have one, you can also place the cookies in a zip-top bag and crush them with a rolling pin or meat tenderizer. Once you’ve turned the cookies into crumbles, set them aside.

Step 2: Melting the Chocolate

Next, prepare the chocolate ganache layer by chopping the semi-sweet chocolate into small pieces and placing them in a small bowl. In a separate pot, heat the milk over medium heat until it’s steaming but not boiling. Once the milk is hot, pour it over the chopped chocolate. Let it sit for about 2-3 minutes to soften, then stir the mixture until the chocolate is fully melted and the milk and chocolate have combined into a smooth, glossy mixture. If there are still chunks of chocolate remaining, heat the mixture in the microwave in 30-second intervals, stirring in between, until the chocolate is fully melted. Set this chocolate mixture aside to cool to room temperature.

Step 3: Whipping the Cream

For the creamy Baileys layer, place the chilled heavy whipping cream, Baileys Irish Cream, and powdered sugar into the bowl of a stand mixer or a large mixing bowl if using a hand mixer. Beat on high speed for about 5-7 minutes, or until stiff peaks form. You’ll know it’s ready when the whipped cream holds its shape and doesn’t collapse when you lift the beaters. Divide this whipped cream mixture into two halves.

Step 4: Folding the Chocolate into the Whipped Cream

Take the first half of the whipped cream and set it aside for later use. Now, with the second half of the whipped cream, slowly add the cooled chocolate mixture to it. Gently fold the chocolate into the whipped cream using a spatula. Be careful not to deflate the whipped cream, and fold until the chocolate and whipped cream are fully incorporated and smooth.

Step 5: Assembling the Parfaits

Now comes the fun part: assembling the parfaits! You’ll need to layer the chocolate cream, whipped cream, and Oreo crumbles in serving glasses. You can use a pastry bag to pipe the layers, or simply use a spoon if you prefer a more relaxed method. Start by adding a layer of the chocolate cream at the bottom of each glass, then follow with a layer of the plain whipped cream. Next, sprinkle some of the crushed Oreo cookies on top. Repeat these layers, alternating between chocolate, cream, and Oreos, until you reach the top of the glass. Finish off the parfaits by sprinkling any remaining Oreo crumbles on top for an added crunch and extra flavor.

Step 6: Chilling and Serving

You can serve the parfaits immediately if you prefer a softer chocolate layer, but for a firmer texture, chill the parfaits in the refrigerator for 2-3 hours. This will allow the chocolate to set and the layers to firm up, making them easier to eat and giving the flavors time to meld together. Once chilled, serve and enjoy!