Pecan Pie

Ingredients

• 1/4 lb. (1 stick) butter
• 3 Tbsp. flour
• 1 box light brown sugar
• 1/3 c. evaporated milk
• 4 eggs
• 1 1/2 tsp. vanilla flavoring
• 2 tsp. vinegar
• 2 c. chopped nuts
• 2 pie crusts