Carrot Loaf Cake!

Name: Carrot Loaf Cake!
Prep time: 20 min
Cook time: 1 h
Total time: 1 h 20 min
Cuisine: European
Ingredients: 175 ml sunflower oil; 3 large eggs; 200 g light brown sugar; 250 g grated carrots; 100 g raisins/walnuts ((optional)); Zest of 1 orange; 200 g self raising flour; 1 tsp bicarbonate of soda; 2 tsp mixed spice; 1 tsp ground ginger; 1 tsp ground cinnamon; 1 tsp nutmeg; 125 g unsalted butter ((room temp)); 125 g icing sugar; 1 tsp vanilla extract; 250 g full-fat cream cheese; Fondant carrots; Chopped nuts