Preheat the oven to 350 degrees F. Grease a 13 by 9-inch cake pan and line with parchment paper. Grease the parchment paper and set aside.
In a large bowl, cream together the butter and sugar. Beat in the eggs 1 at a time. In a medium bowl, sift together the flour, ginger, baking soda, cinnamon, salt, cloves, and nutmeg. In a third bowl, combine the molasses and beer and stir to dissolve. Add the dry ingredients and beer mixture alternately to the egg mixture, beating after the addition of each.
Pour into the prepared pan and bake until puffed and set, about 35 minutes. Remove from the oven and let cool in the pan on a wire rack. Spoon the Creme Anglaise onto the middle of 12 dessert plates. Cut the gingerbread into 12 equal portions and place on plates. Sprinkle with confectioners' sugar and serve.