I did a thing. I made a small batch of brownies, a small pot of pudding laced with Irish cream, and layered it all together. I did a whipped cream and chocolate shaving thing on top, too. And the good news is, with the rest of the bottle of Irish cream liqueur, you can have a brunch party this weekend!
For the brownies: Preheat the oven to 325 degrees F. Line a 9-by-5 inch loaf pan with parchment paper.
Melt the butter in a small saucepan over low heat. Add the sugar and cocoa powder and cook, stirring often, until the mixture is melted and smooth, about 3 to 4 minutes. Transfer to a medium bowl and let cool slightly. (Alternatively, combine the butter, sugar and cocoa powder in a microwave-safe bowl and microwave on high for 30 seconds. Stir, then microwave on high for another 30 seconds.)
Stir in the salt and vanilla, then let the mixture cool for 1 minute more. Add the egg and stir until incorporated. Add the flour and stir for 50 brisk strokes.
Spread the batter into the prepared pan. Bake until a toothpick inserted in the center comes out with fudge crumbs clinging to it and the surface is shiny and starting to crack, about 23 minutes. Let cool completely in the pan.
For the Irish cream pudding: Meanwhile, whisk together the sugar, cornstarch and salt in the bottom of a 2-quart saucepan. Slowly add the milk and egg yolk while constantly whisking.
Turn the heat on the pan and bring it to a gentle simmer while constantly whisking. (Be sure to scrape the edges of the pan frequently to prevent lumps. Whisking vigorously will break up any lumps.) Cook the pudding, constantly whisking, until it thickens and coats the back of a spoon, 4 to 5 minutes. Remove from the heat and stir in the Irish cream liqueur and butter until melted.
Lift the brownies out of the pan using the parchment paper and chop into 1/2-inch cubes. In two small glasses, layer about one-third of the brownie cubes and top each with half of the pudding. Repeat with another layer of brownie cubes and pudding. Top each with the remaining brownie cubes. Cover the trifles with plastic wrap and refrigerate for at least 4 hours and up to overnight.
For assembly: Before serving, whip the heavy cream and the sugar together in a large bowl with an electric mixer on high speed until soft peaks form, about 2 minutes. Dollop each trifle with the whipped cream, sprinkle with the chocolate shavings and serve.