In a large saucepan over medium heat, melt the coconut oil. Add the chopped onion and sauté until soft, about 5 minutes, stirring every so often. Add in the minced garlic, stir for another minute or so.
Add in the spices and stir well. Pour in the beans and HALF the milk (1/4 cup) stir well, lower the heat to low and simmer for about 20 minutes. Add in more milk if it looks like it's getting too dry
Remove from the heat and mash with a potato masher until you reach your desired texture. Add in more milk of you like a creamier consistency