In a large skillet, heat the olive oil over medium heat. Season the chicken thighs with garlic powder, paprika, cumin, salt, and pepper. Add the chicken to the skillet and cook for about 5-7 minutes on each side, or until fully cooked and golden brown. Remove the chicken from the skillet and set aside.
In the same skillet, pour in the chicken broth and bring to a simmer. Add the cooked rice and stir to combine. Let it cook for about 5 minutes, allowing the rice to absorb some of the broth flavors.
While the rice is cooking, prepare the green sauce. In a blender, combine the cilantro, jalapeño, garlic, lime juice, salt, and mayonnaise. Blend until smooth and creamy. If the sauce is too thick, add a little water to reach your desired consistency.
Slice the cooked chicken thighs and serve them over the rice. Drizzle the green sauce generously over the top.
Enjoy your Peruvian chicken and rice warm, garnished with extra cilantro if desired.