Preheat oven to 350℉. Spray a 15 1/2" x 10 1/2" x 1" baking sheet with non stick spray and line pan with parchment paper. Whisk together egg yolks, sugar and ginger until light and tripled in volume, approximately 5 minutes. Add butter, molasses, and vanilla, whisking to combine. Sift together flour, baking powder, baking soda, spices, and salt. Fold sifted ingredients into egg yolk mixture until just combined. Do not over mix.