in a medium sauce pan over medium heat, melt butter. Add onion and cook until onion is starting to turn translucent.
Add the flour and continue to cook for about 5 minutes or until the raw smell of flour dissipates and the mixture starts to turn into light brown color (see notes).
In the microwave heat the milk until just below simmering.
Remove the pan from the heat temporarily and add the hot milk, stirring with a whisk to avoid clumps. Return to heat.
Add the garlic, garlic powder, salt, pepper. stir to combine. Return to a simmer.
in small handfuls add the parmesan waiting about a minute between handfuls to melt the cheese. Keep the sauce warm until serving, stirring occasionally.
For Chicken
Pat the chicken dry using paper towels.
Coat the chicken using oil or cooking spray. Add the blackened seasoning on one side, making sure to coat liberally. Leave the other side of the chicken unseasoned for now. Preserve some of the seasoning for other side later.
In a large cooking pan over medium high heat, add the oil. heat the oil until just starting to smoke.
Carefully lower the chicken into the pan season side down. Season the unseasoned side of chicken facing up with the remaining seasoning.
Cook for 5 to 7 minutes. flip and continue to cook adding a cooking weight if you have one.
Once internal temp reaches 165° F, remove from heat and cover with aluminum foil. Keep the chicken warm until serving.
Keep the uncleaned pan available for later use.
For Pasta
In a large pot….. I don’t feel like I need to explain how to cook pasta. If you don’t know how to cook pasta in salt water God help you! just make sure to cook it until al dente making sure to preserve come of the cooking water.
Add the drained pasta to the pan you used for the chicken. Over medium high heat, Add about of cup of the pasta water to the pan. Add the alfredo sauce one ladle at a time until it reaches the desired consistency.
Bring the pasta to a simmer. remove from heat.
slice the chicken and add it to the top of the pasta and serve. Add parmesan cheese for garnish is desired.