step 1
Preheat the oven to 180C/Gas 4/fan 160C and line a deep medium sized cake tin.
step 2
Add sugar into a large mixing bowl, oil and eggs. Lightly mix with a wooden spoon until mixed well.
step 3
Stir in the grated carrots, raisins/walnuts and orange zest.
step 4
Mix the flour, bicarbonate of soda and spices together, then sift into the bowl.
step 5
Lightly mix all the ingredients until evenly mixed - mixture will be soft and almost runny.
step 6
Pour the mixture into the prepared tin and bake for 40- 45 minutes
step 7
Cake is cooked when it is firm and springy when pressed and a skewer comes out clean. Leave the cake until it is cool throughout before adding the icing to the top.
step 8
For the Cinnamon Buttercream Frosting -
step 9
Mix soft butter and icing sugar together until soft and creamy, add cinnamon and lightly stir in.