Preheat the oven to 350. Butter a 9x13 pan or line with parchment (which I think works the best).
Gather your ingredients
Cream the butter and sugar. Add the eggs one at a time. Add the molasses and ginger. Slowly add the dry ingredients. Scrape everything down and mix it up again. Slowly add the 1 cup of boiling water. Mix. Pour into your prepared pan.
Bake for about 35-45 minutes- the middle of mine was cracked and still pretty soft when I took it out at 40 minutes, but it turned out to be perfectly cooked and still really moist.