Preheat the oven to 350 degrees F. Prepare a 8.5 x 4.5 inch loaf pan by greasing and lining it with parchment paper for easy removal. Set aside. In a large mixing bowl, add all-purpose flour, baking soda, baking powder, ginger, cinnamon, cloves, nutmeg and salt. Whisk until thoroughly combined. 235 grams all-purpose flour, 6 grams baking soda, 2 grams baking powder, 3 grams ginger, 2 grams cinnamon, 1 gram cloves, 1 gram nutmeg, 3 grams salt
In a liquid measuring cup, add the hot water (no hotter than 100 degrees F) and molasses. Whisk until smooth.
120 grams hot water, 200 grams molasses
In a separate bowl, add the brown sugar, oil, sour cream, egg, sourdough discard, vanilla and the molasses mixture. Whisk until smooth.
110 grams light/dark brown sugar, 40 grams neutral oil, 140 grams sour cream, 1 egg, 120 grams sourdough discard, 4 grams vanilla extract
Pour the wet ingredients into the dry ingredients and use a rubber spatula to mix until just combined! Careful not to over mix the batter, otherwise this can lead to a dense quick bread. The batter will be thin.
Long-ferment: Cover and store this batter in the fridge overnight to long-ferment before moving on to the next step.
Pour the quick bread batter into the prepared loaf pan and bake for 50-60 minutes, or until a toothpick put in the center comes out clean or with a few moist crumbs.
Leave the quick bread in the loaf pan for 10 minutes before removing it to cool completely on a wire rack. Cool for at least 2 hours for the easiest slicing.