Preheat your oven to 180C. Grease and line a 2lb loaf tin.
In a large saucepan gently melt the butter, sugar snd black treacle together. Allow to cool for about 10 minutes.
Add the spices and flour and mix together.
Add the eggs one by one stirring until combined.
Warm the milk gently in a small saucepan. Add the bicarbonate of soda and let it fizz and froth a little.
Pour into the cake batter slowly mixing continuously.
Pour cake mixture into your prepared cake tin and bake in your preheated oven for 50 minutes to 1 hour or until baked right through. Leave to cool in the tin for 10 minutes then fully cool on a wire rack.