Trondheimssodd is a traditional sweet soup originating from Trondheim. It is usually made with a combination of water, sugar, salt, flour, cinnamon, whipping cream, raisins, and rice. The rice, raisins, and cinnamon are placed in water and simmered until the rice becomes fully cooked.

The flour is whisked into the cream, and the combination is added to the pot. The soup is simmered for a few minutes until it thickens, and it's then sweetened with sugar and seasoned with a few grains of salt before serving.