For the chocolate brownie with cashews and parsnip cubes, peel the parsnips and cut into cubes. Heat the hazelnut oil in a pan and steam the parsnip cubes until al dente. Preheat the oven to 170 °C.
Heat the chocolate to 40 °C with the butter and sugar. Now stir in the remaining ingredients and pour into a frame or mold to a height of 4-5 cm. Bake in the hot oven for 30 minutes and then let cool. Cut the chocolate brownie with cashews and parsnip cubes into squares and serve.