Preheat the oven to 350 F

Line the bottom of the cake pan with parchment paper

In a mixing bowl, whisk the flour, baking soda, ginger, salt, cinnamon, nutmeg, and cloves

Add the brown sugar, butter, molasses, and egg in a mixing bowl. Use an electric mixer on high speed until light and fluffy, about 5 minutes

Add the flour mixture and beat on low speed until just combined

Add the crystallized ginger and stir with a rubber spatula until evenly incorporated

Put the dough into the pan and press it into an even layer. Using a knife, score the top of the dough into 8 wedges, and sprinkle with turbinado sugar

Bake for 25-30 minutes, until a knife or toothpick comes out clean of the center

Let the wedges cool for at least an hour before serving. Cut along the scored lines