Preheat oven to 175C. Grease and line one, 9 inches round baking pan with baking paper
Grate the carrots using a box grater and leave aside
In a big bowl place flour, baking powder, salt, cinnamon and mix well
In a bowl of the stand mixer add in the white sugar, brown sugar, vanilla essence and beat well. Gradually add the oil. Then add the eggs.
Add in the flour mixture and reduce the speed
Finally add the grated carrots, walnuts and raisins and mix well to combine on a low speed
Pour into prepared lined cake pans and bake for 35-40 minutes or until a skewer inserted into the middle comes out clean
Once it's out of the oven rest for 30 minutes before unmolding the cake. Cooldown completely on a cooling rack before frosting the cake