Preheat oven to 180 °C (350°F) conventional (see note 2 if using a convection oven with a fan) and lightly grease an 8.5x4.5inch loaf tin and line it with parchment paper, leaving some of the parchment hanging over the edges.
Sift together flour, cornstarch, baking powder, baking soda, salt, cinnamon, ginger, nutmeg and cloves. Using a whisk, mix together until well combined and set aside for now.
In a large bowl combine white granulated sugar, eggs, unflavored vegetable oil, pumpkin puree, milk and vanilla. Using a whisk, mix until well combined and smooth.
Add the dry ingredients into the wet ingredients and using a whisk, mix gently until just combined. Do not overmix.
Pour the batter into the prepared loaf tin. Drop the tin lightly on the counter to remove any large air bubbles and bake for 65-70 minutes, or until a skewer or thin knife inserted into the centre comes out clean or with a few moist crumbs on it. If your loaf tin is slightly larger than mine, then check the bread at the 55 minute mark.
Allow to cool in the tin for 20 minutes, before lifting the bread out of the tin using the excess parchment hanging over the edges and place onto a wire rack to cool. Once ready, slice and serve!