Combine the flour, spices and cocoa powder in a mixing bowl.
Cream butter in the bowl of your stand mixer on a medium-high speed until smooth, and gradually add the sugar until light and fluffy.
Add in the eggs one by one and mix until combined. If you notice it curdling, don't fear, all will be ok once you add the flour. Add in the molasses, vanilla extra and milk. Whisk until creamy.
Combine the flour mix into the wet ingredients and mix on a medium-low speed.
Use loaf tin liners to prepared pan as these are so much quicker than cutting and using ordinary baking paper. Pour cake batter into the prepared loaf tin. Make sure your scrape the sides of the bowl to get off all the mix! Bake at 180 degrees c in a preheated oven for 55 minutes. Obviously everyone's oven is different so check with a skewer after the first 30 minutes. The skewer should come out clean. Check every 10 minutes after. Cool in the tin for 5 minutes and release onto a wire rack.