In a small bowl, combine paprika, chili flakes, salt and garlic powder.
Pat the chicken thighs dry with a paper towel. Then rub the seasoning blend onto the skin of the chicken.
Turn the Instant Pot on to the sauté setting. Add 2 tablespoons of olive oil.
Add chicken thighs and cook on each side for 2-3 minutes until the chicken is a nice deep golden color. Remove chicken from the Instant Pot and set on a plate.
Put the butter into the instant pot.
Once it is melted, add the chopped onion and minced garlic. Sauté for a minute.
Add the lemon juice and deglaze the pan by scraping the bits off the bottom.
Then add Italian seasoning, lemon zest, and chicken broth.
Put the chicken back into the Instant Pot. Flip over to coat in lemon butter sauce.
Put the lid on and lock. Turn the valve to sealing.
Set to cook for 7 minutes. When the presure cooker is done, allow to naturally release for 5 minutes.
Turn the valve to release and allow all the steam to release. Push stop.
Unlock the lid and remove chicken to a clean plate and set aside.
In a small bowl, whisk together cornstarch and water to make a slurry. Add slurry to the juices in the Instant Pot. Turn back to sauté. Whisk and heat until the sauce thickens, about 5 minutes.
Put chicken back into the pot. Garnish and serve.