Cut chicken breasts in half horizontally (to make 4 pieces total). Season both sides of chicken breasts with salt, garlic powder, black pepper, and chili powder.
Heat 1 tablespoon olive oil in a large skillet or cast iron pan over medium-high heat. Add 2 tablespoons butter along with the chicken breasts. Cook chicken breasts 4-5 minutes per side or until browned and cooked through.
Remove chicken breasts from the pan and add the remaining 2 tablespoons butter, garlic, Italian seasoning, and crushed pepper. Stir for 1 minute or until garlic is fragrant and add the broccoli, water, and lemon juice to the pan. Cook broccoli 2-3 minutes or just until cooked.
Return chicken to the pan and garnish with parsley, cilantro, or lemon if desired. Serve immediately.
