Preheat oven to 325 degrees. Line two 8" pans with parchment paper. Spray sides of pans with baking spray and flour (or use Baking PAM).
In base of a stand mixer or in a large bowl using handheld mixer, beat together butter, sugar, and brown sugar until light and fluffy.
Beat in two eggs and two egg yolks, one at a time, beating well after each addition (put the 2 egg whites aside to use for meringue). Scrape down sides of bowl as needed.
In a cup, stir together milk and almond extract.
In a small bowl, whisk together flour, cornstarch, baking powder, salt, and cinnamon.
Alternate beating milk and flour mixtures into butter/egg mixture, starting and ending with milk mixture.
Divide batter between the two prepared pans.