Low FODMAP Carrot Cake with cream cheese frosting

Name: Low FODMAP Carrot Cake with cream cheese frosting
Prep time: 15 min
Cook time: 55 min
Total time: 1 h 10 min
Cuisine: American
Ingredients: 175 g (1 cup) light brown Sugar; 175 ml (3/4 cup) sunflower oil; 3 eggs; 140 g (1 3/4 cups) grated carrots; 175 g (1 1/3 cup) gluten-free flour (I use Mix It Universal from Schär); 10 g (2 tsp) baking powder; 1 tsp baking soda; 1 tsp cinnamon; 1/2 tsp nutmeg; A pinch of salt; Optional: 50 g (1/2 cup) chopped walnuts or pecans; Optional: 75 g raisins (1/2 cup) (put 10 min into warm water, drain; 200 g (7 oz) lactose-free cream cheese; 250 g (2 cups) icing sugar; 70 g (1/3 cup) butter or margarine; Optional: chopped walnuts or pecans for decoration; A 25 cm cake loaf tin (10 inch)