I love love love these - I basically go there for the frijoles, so imagine my excitement when I found a recipe! frijolesrecipe
And now I'm very sad because what I made does not taste like frijoles. 
It's a pale grey brown colour, with nutty textured bean bits, that tastes mostly of butter.
Does anyone know how to do this right?
I soaked the beans for about 16 hours, then boiled for an hour as directed on the packet...