'1/2 cup all-purpose flour'
'5 tablespoons butter or margarine'
'1/2 liter whole milk'
'2/3 cup cheddar cheese, cut into small pieces (150g)'
'1 tablespoon grated Parmesan cheese'
'3 eggs'
'Salt'
'1/2 cup all-purpose flour'
'5 tablespoons butter or margarine'
'1/2 liter whole milk'
'2/3 cup cheddar cheese, cut into small pieces (150g)'
'1 tablespoon grated Parmesan cheese'
'3 eggs'
'Salt'
Make a thick white sauce with butter or margarine, flour, salt, and milk
After it's well combined, add the two cheeses and let it simmer over low heat until the cheese melts completely
Remove from heat, let it cool slightly, then beat in the 3 egg yolks
Beat the egg whites until fluffy and fold them into the remaining mixture, stirring slowly with a circular motion
Choose a rectangular baking dish, butter or margarine only the bottom to help firm the soufflé
Place in a hot oven (regular temperature, 190°C) in a water bath with boiling water
Let it cook for 50 minutes
Serve immediately
If desired, leave in the oven turned off for an additional 10 minutes.