Preheat the oven to 350° F. Butter a (9×5 inch) bread pan.Combine the sugar and cinnamon.In a large bowl, stir together the coconut oil, maple syrup (or honey), yogurt, egg, vanilla, and milk, until combined. Add the flour, baking soda, and salt, and mix until just combined. Fold in the white chocolate.Spoon half the batter into the prepared bread pan. Sprinkle with the cinnamon sugar, leaving 1 tablespoon reserved for topping. Evenly spoon the remaining batter over the sugar. Sprinkle over the remaining cinnamon sugar.To make the crunch. Mix the butter, brown sugar, flour, and cinnamon. Spoon clumps of the brown sugar mix over the loaf. Bake for 55-60 minutes, or until the center is just set. Remove the bread and let cool, or enjoy warm slathered with salted butter. YUMMMM!