Preheat your oven to 350 degrees F and prepare a 9×5 loaf pan by spraying it with non-stick spray. This will ensure your loaf comes out easily once baked.
In a medium-sized mixing bowl, combine all-purpose flour, baking soda, cinnamon, allspice, ground nutmeg, kosher salt, and ground cloves. Whisk these together thoroughly to ensure an even distribution of the spices and leavening agent.
In the bowl of an electric mixer, combine the melted butter, dark brown sugar, and molasses. Beat on medium speed for about 3 minutes until the mixture is well combined and creamy.
Add in the milk, grated fresh ginger, vanilla bean paste, and maple extract. Mix on low speed for about 1 minute until everything is well incorporated.
Crack the eggs into the mixture one at a time, ensuring each is fully blended before adding the next. Scrape down the sides of the bowl as necessary.
Gently fold in the mashed ripe bananas until just combined. The mixture should be slightly lumpy, which is perfect.
With the mixer on low, gradually add the flour mixture to the wet ingredients. Mix until just combined, being careful not to overmix.
Finally, fold in the diced crystallized ginger. This will add lovely pockets of chewy sweetness to your loaf.
Pour the batter into the prepared loaf pan, smoothing out the top with a spatula. Bake in the preheated oven for 45 to 55 minutes. You’ll know it’s done when the middle is set and a toothpick inserted comes out clean.
Once baked, allow the bread to cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely. This step is crucial to maintaining its structure and preventing sogginess.