Preheat oven to 375 degrees. Grease thoroughly a mini muffin tin tray with coconut oil. In a food processor or high speed blender, blend together all the ingredients except the currants and walnuts until fully combined. Add currants and mix with a spoon.
Fill mini muffin tray almost to the top. Sprinkle chopped walnut pieces on top. Bake for 20 minutes or until toothpick is clear.