Pre-heat the oven to 160C Fan/180C/350F/Gas Mark 4 and grease and line a 2lb loaf tin
Mix together the butter, Biscoff spread and light brown sugar, ideally using an electric mixer, until light and fluffy
Add the eggs and whisk in until smooth
Whisk in the flour gently until fully combined
Pour the mixture into the loaf tin and bake for an hour and 15 minutes, or until a skewer inserted in the centre comes out clean (I recommend checking it after 1 hour). Leave to cool fully either in the tin, or remove it from the tin and place on a cooling rack
To make the buttercream, use an electric mixer or a spoon to mix together the butter and icing sugar until they start to combine, then add the Biscoff spread and milk and mix until smooth. If the buttercream is too stiff you can add more milk
Put it into a piping bag and pipe it onto the loaf cake, or spread on with a spoon or spatula
Decorate with the Lotus Biscoff biscuits. The biscuits will go soft after several hours in contact with the buttercream so add them later if you're not serving the cake straight away
Store in an airtight container in a cool place and eat within 3 days
Video
Notes
I’ve reduced the buttercream amount after feedback it was too much (what can I say… I love buttercream!). The previous quantities were 150g Butter, 300g Icing sugar and 200g Biscoff.If you're swapping the self raising flour for plain flour, you'll need to add 2 tsp baking powder.