Add oil to a medium saucepan. Heat oil over medium heat.
Whisk in flour, salt, and pepper to make a roux.
Whisk milk into the flour and oil mixture. Increase heat to medium high. Stir frequently, being sure to stir along the bottom of the pan to keep the flour from settling.
When the sauce starts to bubble, reduce heat to medium and continue to cook until the sauce thickens.
Stir in chicken. Heat through and serve.
Notes
* Nutrition information is estimated using a database that this writer is not responsible for. Exact nutritional information is dependent on a variety of factors like exact ingredients and amounts used, serving size, etc.
Stir the sauce frequently to keep the flour from sticking to the bottom of the pan.
The sauce can be made a few hours ahead of time.
Let leftovers come to room temperature before storing in an airtight container. Refrigerate for up to 3 days.
Check out the complete post for recipe variation ideas and ways to serve it.