This is such a wonderful recipe! If you don't make crepes, don't worry, most grocery stores sell them in the produce or deli departments now!
Over medium heat, melt butter in small saucepan. Stir in flour and cook until bubbly. Add broth and Worcestershire sauce; cook, stirring until thickened. Add 2 cups cheese. Empty sour cream into medium bowl; gradually add hot cheese sauce, stirring constantly. In large shallow baking dish, place cooked broccoli and cooked chicken on each crêpe. Spoon 1 tablespoon sauce over each. Fold crepes over. Pour remaining sauce over all. Sprinkle with remaining cup of cheese. Cover and heat in 350º F oven for 20 to 30 minutes.