Heat the oven to 350 degrees and grease a small bundt pan.
In a mixing bowl, whisk the flour, brown sugar, ginger, cinnamon, baking soda, and cloves.
Add the molasses, 1/4 cup stout, melted butter, and egg. Stir until the batter is smooth.
Pour the batter into the prepared pan and bake for 30 minutes, or until a toothpick comes out clean.
Let the cake cool in the pan for 10 minutes, then turn it out onto a rack to finish cooling.
While the cake cools, simmer the orange slices, granulated sugar, and water in a small saucepan for 15 minutes until the peels turn translucent. Drain and set aside.
Whisk the powdered sugar with the remaining 1/4 cup stout to make the glaze.
Drizzle the glaze over the cooled cake and arrange the candied orange slices on top.