Prep Oven & Pan: Preheat oven to 350°F (175°C). Grease a standard 9x5-inch metal loaf pan and line with parchment paper, leaving an overhang on the long sides for easy lifting.

Whisk Dry Ingredients: In a medium bowl, whisk together flour, baking soda, salt, ground ginger, cinnamon, cloves, and nutmeg until uniformly blended.

Cream Butter & Sugar: In a large mixing bowl or stand mixer fitted with paddle attachment, beat softened butter and brown sugar on medium speed for 2 minutes until light and fluffy. Beat in the egg and vanilla extract until incorporated, then stream in the molasses.

Alternate Flour & Boiling Water: Add half the dry ingredients to the creamed mixture, beating on low speed just until combined. Pour in the 1/2 cup boiling water, mix gently, then fold in the remaining dry ingredients. Do not overmix; batter will be glossy and pourable.

Bake to Springy Perfection: Pour batter into prepared loaf pan. Bake at 350°F (175°C) for 48 to 55 minutes, or until a wooden toothpick inserted into the center comes out clean or with a few moist crumbs. Cool in pan on a wire rack for 20 minutes, then use parchment handles to lift cake onto the wire rack to cool completely.

Whip Frosting & Decorate: In a medium bowl, beat softened cream cheese and butter for 2 minutes until silky smooth. Add powdered sugar and vanilla, beating for another 2 minutes until billowy and spreadable. Swoosh frosting generously over the cooled loaf cake, sprinkle with candied ginger and cinnamon, slice into thick pieces, and enjoy!