unsalted butter, room temperature • (1.4 oz, 3.5 Tbsp) granulated sugar • egg (50g, 1.75 oz), room temperature • milk or soy milk • dark chocolate, couverture • ground almonds • (3.5 oz, 4/5 us cup) cake flour or all-purpose flour • cocoa powder, sugar-free • baking powder • squash, peeled, seeded • granulated sugar 30g • cinnamon powder, optional •