This appetizer has been on the menu of the Liberty Bar in San Antonio for decades, and after having it once it haunts you. Hence the need to make it at home.
A few notes on ingedients: the Liberty Bar uses chile morita, which is sometimes used in canned chipotle en adobo sauce. I have come to like the adobo sauce addition, and it's easier to find than dried moritas in some places. Piloncillo is a wonderful unrefined brown sugar shaped in a cone and commonly found in Mexican grocery stores, often in the produce section. It has a fruity taste compared to bagged brown sugar.
Liberty Bar opened in 1984, and a version of the recipe was published in Gourmet in 1996. —Meredith
8-ounce cone of piloncillo (Mexican brown sugar)
grilled or toasted bread for serving.
Put the cheeses, minced garlic, salt, 1/2 of a minced chipotle, and adobo sauce to taste (start with 1 teaspoon) in a deep mixing bowl. Use a hand-held mixer to completely mix the ingredients until the mixture is pale orange.
Line a small squash or rectangular glass dish with parchment or plastic wrap, then pack the cheese mixture into it (the layer of cheese should be 2 to 3 inches thick), cover, and refrigerate for 4 hours (up to overnight).
About an hour before serving, make the sauce by heating the cream, the whole chipotle, and the piloncillo cone on low heat. The piloncillo will slowly dissolve and can be broken apart with a wooden spoon as it melts—about 20-25 minutes, stirring frequently. The mixture may foam and bubble, but avoid letting it fully boil. When ready, the sauce will be a thick caramel color. Remove and discard the chipotle, and remove the sauce from the heat to cool for about 15 minutes.
Allow the sauce to cool for about 15 minutes to room temperature. Turn the cheese block out onto a serving dish with some depth, like a shallow bowl, as there will be a lot of sauce. While the sauce is still a little warm, pour it over the cheese (if it's too hot, it will melt the cheese).
Use a knife to spread cheese and sauce onto a piece of grilled or toasted bread, and enjoy.