Polvorones de naranja y canela
all-purpose flour (about 500 grams) • powdered sugar (about 200 grams) • unsalted butter (about 250 grams) • egg yolks • baking soda • Juice of 2 oranges • orange zest • ground cinnamon (about 15 grams) • powdered sugar (about 200 grams), for dusting