Roughly cut broccoli into florets and set aside.
Add the butter to the saucepan and melt at 100 °C on stirring speed 1.
Gradually add the flour to the melted butter. Add the water, milk and cream and stir once on speed 3 until smooth. Then bring to the boil on speed 1. Now season with stock, salt and pepper. 3 minutes before the end, add the broccoli florets and chop once on higher speed. Then bring to the boil again, season to taste and serve. Tip: If the soup is too liquid, simply thicken with cornstarch.