In the bowl of a stand mixer fitted with the paddle attachment, combine the shortening and sugar, beating until well combined. Add in the egg, molasses, and vinegar, mixing well.
Sift in the flour, salt, ginger, cinnamon and cloves and mix well.
Divide dough in two, wrap in plastic wrap and chill for at least three hours or overnight.
Heat oven to 375 degrees and line baking sheets with parchment paper.
Roll chilled dough on well-floured surface to about 1/4 thick. Cut using your favorite cookie cutters and place on lined baking sheets. It helps to use an offset spatula to slide under the cut out shapes, and peel away the excess dough after it's ben cut.
Bake at 375 degrees for 7-8 minutes or until edges barely begin to turn brown.
Cool and frost by making a glaze of powdered sugar, milk and corn syrup. Decorate with plenty of sprinkled and colored sugar :)
