Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a mixing bowl, whisk together the flour, baking powder, ginger, cinnamon, cloves, and salt.
In another bowl, beat the butter and sugar until light and fluffy. Add the eggs one at a time, then mix in the molasses and vanilla extract.
Gradually add the dry ingredients to the wet ingredients, mixing until combined.
Divide the dough in half and shape each half into a log about 12 inches long. Place the logs on the prepared baking sheet.
Bake for 25-30 minutes, until the logs are firm to the touch. Remove from the oven and let cool for 10 minutes.
Reduce the oven temperature to 325°F (165°C). Using a serrated knife, slice the logs diagonally into ½-inch thick slices.
Place the slices cut side down on the baking sheet and bake for another 10-15 minutes, until crisp and golden. Let cool completely before serving.