Cream of Corn Soup

2 T butter
2 T flour
1 ½ c milk
½ c water
½ an onion, finely diced
2 rashers bacon, finely diced
1 T extra butter
2 level tsp onion stock powder or onion soup mix powder
410g tin cream style corn
Melt butter, add flour, add milk and water, then onion stock. Cook, stirring constantly, until sauce thickens, then cook 2 minutes longer. Microwave onion and bacon in extra butter until onion is soft. Add with the tinned corn to the sauce.