01 - Pat chicken breasts dry with paper towels. Season both sides generously with salt and black pepper. Dredge each piece lightly in flour, shaking off excess to ensure even coating.
02 - Heat olive oil and butter in a large skillet over medium-high heat until butter foams. Add chicken breasts and sear for 4–5 minutes per side until golden brown and internal temperature reaches 165°F. Transfer to a plate and tent loosely with foil.
03 - Reduce heat to medium. Add minced garlic to the skillet and sauté for 1 minute until fragrant, being careful not to brown.
04 - Pour in chicken broth, using a wooden spoon to scrape up browned bits from the bottom. Simmer for 2 minutes to reduce slightly and concentrate flavors.
05 - Stir in heavy cream, lemon zest, and lemon juice. Bring to a gentle simmer, then whisk in Parmesan cheese until completely melted and sauce thickens slightly, about 2–3 minutes.
06 - Return chicken to the skillet, spooning sauce generously over each piece. Simmer for 3–4 minutes until heated through. Garnish with chopped parsley and crushed red pepper flakes. Serve immediately.