Preheat your oven to 180C (fan) and line a baking tray with baking paper.
Put the beetroot in a blender or food processor and blend until smooth.
Cream the butter and honey together and add the eggs, one at a time.
Fold in the flour, ground almonds, cacao, salt and baking powder.
Mix the beetroot into the mixture.
Pour the mixture into your baking tray and bake for 20minutes.
Allow to cool before serving.