Preheat oven to 350°F. Lightly grease a 9x13-inch metal baking pan.
In a medium bowl whisk together cake flour, baking powder, baking soda, salt, cinnamon, ginger, and nutmeg.
In a large mixing bowl beat egg yolks with ½ cup sugar until pale, thick, and ribbon-like, about 3–4 minutes.
Mix in pumpkin puree, milk, oil, vanilla extract, and dissolved espresso powder.
Fold dry ingredients into wet ingredients until just combined.
In another clean bowl beat egg whites until foamy. Slowly add remaining ¼ cup sugar and continue whipping until stiff glossy peaks form.
Gently fold egg whites into batter in 3 additions using a rubber spatula.
Spread batter evenly into prepared pan.
Bake for 27–29 minutes or until lightly golden and center springs back gently when touched.
Cool cake for 10 minutes.