Cut wings into sections with kitchen shears. Place meaty sections in slow cooker.

In a bowl, combine chicken broth, garlic powder, and onion powder. Whisk to mix.

Pour broth over chicken wings.

Cover and cook on high for 2-3 hours (until internal temperature is 165 degrees F).

Remove wings from slow cooker and place on baking pan.

Sprinkle wings with 1/4 cup grated Parmesan cheese.

Broil for 5-7 minutes (watching carefully), until wings are brown.

Prepare all ingredients before beginning to make the sauce.

Melt butter in a small saucepan.

When butter is melted, whisk in flour, salt, and pepper. Cook, whisking constantly, until all liquid is absorbed and a thick paste forms.

Slowly whisk in whole milk.

Add garlic and stir.

Slowly add Parmesan cheese, whisking to avoid lumps.

Let sauce simmer for 2-5 minutes, until thick and heated through.

Drizzle sauce over wings, or serve in small bowl for dipping.