Drain the corn. Peel and chop the onion. Fry ham in hot butter until crispy, remove and drain on kitchen roll. Sauté onion and corn in frying fat. Dust with flour and sweat.
Add milk, 1⁄4 l water and stock while stirring. Bring to the boil and simmer for about 5 minutes.
Rinse the sprouts and let them drip off. Break the ham into pieces. Season soup with salt and pepper. Serve with sprouts and ham chips.