Boil the beans until tender, mash well and pass through a fine sieve. Bring back to medium heat and boil, removing the foam that comes to the surface. Once foamless, add sugar, salt, milk, spices and coconut milk *. Let it boil for a few more minutes. Add sweet potatoes and cook until soft. Finally, add the butter and raisins. Remove from heat and rest. Serve with Pizkas milk cookies.

* To extract the milk from the coconut, grate it and add ½ cup of hot water.