Season chicken thighs with paprika, salt and pepper to taste.
Melt 2 Tbsp butter in a large oven-proof skillet over medium-high heat. Add chicken, skin-side down, and sear both sides until golden brown, about 2-3 minutes per side. Drain excess fat and set chicken aside.
Melt remaining tablespoon of butter in the skillet. Add garlic and cook, stirring frequently, until fragrant, about 1-2 minutes. Stir in chicken broth, heavy cream, parmesan cheese, lemon juice and thyme.
Bring to a boil. Reduce heat, stir in spinach,and simmer until the spinach has wilted and the sauce has slightly thickened, about 3-5 minutes. Return the chicken to the skillet.
Place into oven and roast until completely cooked through, about 25-30 minutes.