Preparation Preheat oven to 400°F. Whisk yolks and cheese in medium bowl to blend. Whisk in half and half. Add flour, salt and pepper; whisk until smooth. Mix in green onions and tarragon. Beat whites in another medium bowl until stiff but not dry. Gently fold whites into cheese mixture in 2 additions. Melt butter in heavy 9-inch ovenproof skillet (with about 4-cup capacity) over medium-high heat. Tilt skillet to coat evenly with butter. Pour soufflé mixture into hot skillet. Bake soufflé until puffed and golden, about 20 minutes. Serve immediately.
Preparation Preheat oven to 400°F. Whisk yolks and cheese in medium bowl to blend. Whisk in half and half. Add flour, salt and pepper; whisk until smooth. Mix in green onions and tarragon. Beat whites in another medium bowl until stiff but not dry. Gently fold whites into cheese mixture in 2 additions. Melt butter in heavy 9-inch ovenproof skillet (with about 4-cup capacity) over medium-high heat. Tilt skillet to coat evenly with butter. Pour soufflé mixture into hot skillet. Bake soufflé until puffed and golden, about 20 minutes. Serve immediately.