Step 1

Place the 4 tablespoons of butter, garlic powder, onion powder, smoked paprika, thyme, salt and pepper in a bowl. Stir until combined.

Step 2

Loosen the skin of the turkey. Spread half of the butter mixture under the skin of the turkey and spread half all over the top of the turkey.

Step 3

Coat a large oval slow cooker with cooking spray and line the bottom of the slow cooker with the onion slices.

Step 4

Place the turkey breast on top of the onion slices. Cover and cook on low for 6 hours or until a thermometer inserted into the thickest part of the breast registers 165 degrees F.

Step 5

Transfer the turkey breast to a baking sheet. Preheat the broiler.

Step 6

Broil the turkey for 4-5 minutes or until skin is browned and crispy.

Step 7

Pour the liquid from the slow cooker through a strainer; discard the solids.

Step 8

Melt 4 tablespoons of butter in a medium pan over medium heat. Add the flour and whisk to combine.

Step 9

Cook the flour and butter mixture for 1 minute.

Step 10

Pour 1 cup of strained drippings and 1 cup of chicken broth in the pan.

Step 11

Cook for 4-5 minutes or until just thickened, stirring constantly. Season to taste with salt and pepper.

Step 12

Slice the turkey and serve with the gravy. Garnish with fresh herbs if desired.