Start by measuring out the milk into a small saucepan and add the grated ginger, ground cinnamon, and dark molasses. Turn the heat to medium-low and keep stirring gently with a whisk as the mixture warms. Watch for the steam and fragrant aroma to develop, about 3-4 minutes.
Once the mixture is hot and fragrant, remove the saucepan from the heat. Pour in the espresso or strong brewed coffee and stir well to combine all the flavors evenly.
Froth the mixture vigorously with a whisk or use a milk frother until it becomes creamy and velvety, with a light foam on top. The sound will be a gentle bubbling, and the mixture should look smooth and inviting.
Pour the hot, frothy latte into your favorite mug. Drizzle with honey or your preferred sweetener, and sprinkle a tiny pinch of nutmeg or allspice on top for extra warmth and aroma.
Serve immediately while steaming hot. Take a moment to inhale the cozy, spicy scent, then enjoy the rich, velvety texture of your homemade gingerbread latte.