Butter, for coating the pan
2 cups all-purpose flour, plus more for coating the pan
3/4 teaspoon ground cinnamon
1/2 teaspoon ground cloves
1/2 teaspoon freshly ground black pepper
1/2 teaspoon fine salt
3/4 cup light (or mild) molasses, such as Grandma’s
3/4 cup vegetable oil
3/4 cup granulated sugar
3/4 cup water
1 1/2 teaspoons baking soda
1/2 cup packed (peeled and minced) fresh ginger (from about 1 [5-inch] piece)
2 large eggs, lightly beaten, at room temperature
Powdered sugar, for dusting (optional)
Whipped cream, for serving (optional)