200 ml (out of a total of 300) liquid pastry cream will be needed only for the base.

Beat the eggs and sugar, then add the oil and 200 ml of cream. Wash the orange, grate its zest, and squeeze the juice from 1/2 of it. Add this juice and zest with all the dry ingredients (baking soda, salt, cinnamon, vanilla).

Sift 300 g of flour and beat. Add the grated carrots and finely chopped walnuts.

Bake at 180 degrees C for 25 minutes.

Melt the butter and mix it with everything else. Beat with a mixer until it reaches a suitable (thicker) consistency and spread it over the baked base.

Decorate as desired :)