Spiked with Baileys Irish Cream, these chocolate brownies with a swirl of tangy cheesecake are out-of-this-world. They are cakey on the bottom, alternately fudgy and creamy in the center and crisp on top. I'm very proud of them: they took six tries and a full day in the kitchen to get right! For a real treat, try them warm out of the oven with a scoop of vanilla ice cream. And be sure to cut them small - they are rich as sin :)