Preheat the oven to 350 degrees F. prepare a 9x13 inch baking dish with foil or parchment paper. Set aside.
In a small mixing bowl, combine the flour, baking soda, cinnamon, ground ginger, nutmeg, and salt with a whisk. Set aside.
In a large mixing bowl with a hand mixer or stand mixer, beat the butter and sugars until smooth and fluffy. Add the vanilla, molasses, and eggs. Mix until completely combined.
Add the dry ingredients and mix with a large spoon or rubber spatula until completely combined.
Add the dough to the prepared baking dish and press into an even layer.
Bake for 15-20 minutes, remove from the oven, and cool completely while making the frosting.
Cream Cheese Frosting
In a large mixing bowl with a hand mixer or stand mixer, beat the butter, cream cheese, and vanilla until smooth and creamy. Gradually add the powdered sugar until completely combined.
Spread the frosting on top of the gingerbread bars in an even layer, if desired, top with sprinkles. For cleaner slices, let the bars set in the fridge for at least 15 minutes before cutting.
Notes
Mix Until Combined– For the best results, be careful not to overmix the gingerbread cookie dough.
Frost Cooled Bars– The bars should be completely cooled before topping with the frosting.
Clean Slices– Chill the frosted bars in the refrigerator for 15 minutes, then slice for cleaner edges.