Step 1

Rinse rice until it runs clear; drain excess water and let sit.

Step 2

Season chicken with lemon juice, 1 teaspoon chili powder, 1 teaspoon salt, and 1/2 teaspoon black pepper.

Step 3

Turn on a multi-functional pressure cooker (such as Instant Pot®) and select Saute function. Add oil to heat. Sear seasoned chicken thighs in the hot oil until golden and crisp, 2 to 3 minutes per side. Remove and set aside.

Step 4

Add butter to the pot, followed by onion; saute until onion is soft and translucent, about 5 minutes. Add garlic and cook and stir for 30 seconds. Add remaining chili powder, paprika, oregano, thyme, and parsley; season with salt and pepper to taste. Mix well. Add drained rice. Gently stir to toast, 2 to 3 minutes. Pour in chicken stock.

Step 5

Arrange seared chicken thighs and any accumulated juices on top in a single layer. Close and lock the lid. Select high pressure according to manufacturer's instructions; set timer for 8 minutes. Allow 10 to 15 minutes for pressure to build.

Step 6

Release pressure using the natural-release method according to manufacturer's instructions, 8 to 10 minutes. Release remaining pressure carefully using the quick-release method, about 5 minutes. Unlock and remove the lid. Let rest for another 10 minutes. Fluff rice with a fork and serve.