Preheat the oven to 350 degrees F. Spray a 9x5-inch loaf pan with baking spray and set aside. In a medium-sized bowl stir together the flour, baking soda, cinnamon, baking powder, and salt, set aside.
Cream together the butter, sugar, and brown sugar in a large bowl with an electric hand mixer for 2 minutes until combined.
Add in the egg and maple extract, mix until combined.
Add half of the flour to the bowl and mix in well.
Next add in half of the buttermilk, and mix it in. Repeat with the remaining flour, then buttermilk.
Spread the batter to the prepared baking dish and smooth out the top, set aside.
In a small bowl whisk together the brown sugar and melted butter.
Stir in the flour until well combined, the mixture will be crumbly.
Add the crumble on top of the batter. Bake for 50-55 minutes until a toothpick inserted into the center comes out clean.
Let cool in the pan for 15 minutes. Take the bread out of the pan and cool, serve warm or at room temperature.