Preheat oven to 180C/160C Fan/350F/Gas 4 and line 3 x 8-inch tins.
Sieve the flour, bicarbonate of soda, nutmeg, cinnamon and salt together into a bowl. (Add baking powder if using Plain Flour)
Add the ingredients to your mixing bowl along with the sugars. Using the paddle attachment and your mixer on a low speed, mix this up for a few seconds.
Tip in the eggs, vanilla extract, melted butter and oil. Mix on a low speed until combined.
Add the grated carrot, and raisins if you are using them and mix them in by hand.
Divide the mixture equally between the 3 lined tins.
Put the tins in the preheated oven and bake for 20-23 minutes.
Leave your cakes to cool in the tin before turning them out.
