Preheat oven to 170deg grease and line an 8ins cake tin
Add the zest, orange juice, and sultanas into a pan, gently heat and simmer for a couple of minutes. Turn off the heat and leave to cool.
With an electric mixer, beat the eggs, oil and sugar together for a few minutes until well combined, continue beating and add the orange extract and mixed spice. Beat for a few more minutes.
Add the ground almonds, carrots, sultanas & orange mixture to the egg mixture and mix, not beat, until well combined.
Add the batter to the tin and bake in the oven for 50 – 55 mins. Testing the centre of the cake with a skewer until it comes out clean.
Leave to cool in the tin for a few moments before turning out to cool completely before slicing.