Preheat oven to 350°.
Place bananas (peel left on) onto a baking sheet.
Slide the bananas into your preheated oven and bake for 15 minutes. Bananas should be soft and the peels should be dark black.
Once roasted, remove the bananas and reduce the temperature of the oven to 325°F and butter and line a 9 x 5 x 3-inch loaf pan. Once the bananas are cool, mash with a fork.
In the bowl of your stand mixer, cream the sugar and butter in a large mixing bowl on medium speed until light and fluffy. Add the eggs one at a time, beating well after each addition.
Add in the mashed the bananas, cinnamon, nutmeg and milk.
In separate bowl, whisk together the flour, baking powder, baking soda and salt. And add to the bowl with the bananas.
Pour batter into prepared pan and bake 40-45 minutes.
Meanwhile, in a mixing bowl, combine the butter, flour, dark brown sugar in a medium bowl. Using a pastry cutter, blend the ingredients. Add a small pinch of salt, and the chopped walnuts and toss.
After 40 minutes remove and sprinkle on topping evenly and bake for 20-25 more minutes or until a toothpick inserted in the center comes out clean. Set aside to cool on a rack for at least 15 minutes.
Slice and spread with honey or serve with ice cream, but I like mine still warm with butter!