Preheat oven to 400°. In a large bowl, whisk the first 6 ingredients. Cut in butter until mixture resembles coarse crumbs. In another bowl, whisk cream, egg, molasses and syrup until blended; stir into crumb mixture just until moistened.
Drop dough by 1/4 cupfuls into a parchment-lined baking sheet. Bake until golden brown, 12-15 minutes. In a small bowl, combine confectioners’ sugar, cream, vanilla and salt; stir until smooth. Drizzle over biscuits; sprinkle with ginger. Serve warm.