Preheat the oven to 350°F (180°C).In a large bowl, sift together the flour, spices, salt, and baking soda.In a mixer, mix the butter and sugar.Add the egg and molasses.Add the flour mixture.Shape into small balls and place on a parchment-lined baking sheet.Refrigerate for 15 minutes.Bake for 8 to 10 minutes. Let cool on a rack.For the glaze: Mix the ingredients until the desired consistency is reached.If the glaze is too thick, add a little water. If it’s too thin, add powdered sugar. Dip the cooled desserts in the glaze and place on a rack to harden.