The coffee marinade is sweetened slightly with a little maple syrup, and the sauce gets a kick thanks to a jalapeño chile.
This was a fabulous recipe! I used Bison as there is a local supplier at our farmer's market every weekend and it has far less fat than regular beef short ribs. I did cut the salt in half and I marinated the ribs over night, browned them and then threw everything into the slow cooker before going to work. The smell in the house was incredible when I got home! I took most of the sauce out and reduced it in a small saucepan. Absolutely fantastic!
Find the recipe here: http://www.epicurious.com/articlesguides/howtocook/dishes/recipeswithcoffee/recipes/food/views/Coffee-Marinated-Bison-Short-Ribs-241342