Heat a skillet over medium-high heat and cook bacon until crisp, about 3 minutes. Add onions and cook until soft and translucent, about 5 minutes. Add chanterelle mushrooms, cover pan, and cook until mushrooms are soft, about 15 minutes.

Stir together sour cream and flour. Add sour cream mixture to mushrooms and season with salt and pepper. Mix to combine and cook until cream is hot, about 1 minute. Stir in chopped parsley right at the end.