Preheat the oven to 170°C/340F. Peel and grate the carrots, and set aside. Finely chop the walnuts and set them aside. Grease and line a 9"x13" baking tin.
375 grams carrots, 75 grams walnuts
In a bowl, whisk together the flour, cinnamon, ginger, mixed spice, salt, baking powder and baking soda. Toss in the walnuts and mix through.
330 grams plain flour, 1 tablespoon ground cinnamon, ¾ teaspoon ground ginger, ¾ teaspoon mixed spice, ¾ teaspoons table salt, 2 teaspoon baking powder, 1 teaspoon baking soda
Either using a stand mixer or electric hand mixer beat the eggs and sugar in a large bowl until the mixture has lightened and has doubled in size. This takes about 3 to 5 minutes.
4 eggs, 110 grams light brown sugar, 100 grams white granulated sugar
With the mixer running, slowly pour in the oil and melted butter, allowing it to emulsify. Then add in the vanilla and mix through for about 20 seconds.
115 grams vegetable oil, 115 grams butter, 3 teaspoons vanilla extract
Fold the grated carrots through the wet ingredients. If using a stand mixer, swap out the whisk for the paddle attachment.
Add in the dry ingredients and mix gently until combined.
Pour the cake batter into the prepared baking dish and bake for 30 to 40 minutes. The cake is done when a cake tester comes out clean.
Allow the cake to cool in the tin for 15 minutes, before turning it out onto a wired cooling rack.
Cream together the cream cheese frosting and butter together at a medium to high speed until both are well combined, soft and fluffy.
170 grams cream cheese, 113 grams butter
Add the icing sugar to the cream cheese mixture and mix together at a low speed. Then add in the lemon juice and mix through.
375 grams icing sugar, 1 tablespoon lemon juice
Load the cake with the cream cheese frosting and spread it out evenly. Top off with chopped walnuts for decoration. Slice, serve and enjoy!
40 grams chopped walnuts