1. Cut butter into cubes and let get to room temperature
2. Add this together with the sugar to the bowl and mix well
3. Once the butter and sugar has creamed together add the carrots and mix well
4. Then add the raisins, flour, bicarbonate of soda, cinnamon, nutmeg and the orange zest  before adding your eggs
5. Mix all ingredients together well then place on a lined baking tray and spread out until even
6. Place in a preheated oven for 20/25 minutes at 180 degrees Celsius
7. once cooked place on a rack to cool