Preheat the oven to 350F. Lightly coat an 8"x8" baking dish with non-stick spray and line the pan with parchment paper. Set aside.
Combine in a bowl, the flour, ginger, cinnamon, nutmeg, baking soda, and salt. Use a whisk to mix well and set aside.
1⅓ cup All Purpose Flour, 1½ teaspoon Ground Ginger, 1 teaspoon Ground Cinnamon, ¼ teaspoon Ground Nutmeg, ½ teaspoon Baking Soda, ¼ teaspoon Salt
Add to a large mixing bowl, the melted butter and brown sugar. Use a hand blender to cream until light in colour.
½ cup Unsalted Butter, ¾ cup Brown Sugar
Pour the molasses and vanilla into the butter mixture and mix until smooth. Add in the egg and blend until smooth.
¼ cup Fancy Molasses, 1 teaspoon Vanilla Extract, 1 large Egg
Add the flour mixture to the large bowl and carefully mix the ingredients together until just combined and no dry flour remains.
Spread the batter into the prepared baking pan. Use a spatula to level the batter, making sure that it gets into the corners. Bake in the preheated oven for 25-28 minutes or until it no longer jiggles in the centre. Remove from the oven and let the bars cool completely in the pan.
Prepare the icing by combining in a bowl, the softened cream cheese and softened butter. Blend the 2 together until smooth and lump free. Add to it, the vanilla and sifted icing sugar. Mix until smooth and set aside.
4 ounces Cream Cheese, 2 tablespoon Unsalted Butter, ½ teaspoon Vanilla Extract, ½ up Icing Sugar
Remove the cooled Gingerbread Cookie Bars from the pan. Spread the icing evenly over the top of the bars with a spatula. Decorate the bars with holiday themes sprinkles if desired. Cut into 10 bars of even smaller squares.