Prepare Shrimp: Pat shrimp dry and season lightly with salt and pepper.
Sauté Garlic: Heat butter and olive oil in a large skillet over medium heat. Add minced garlic and cook for about 1 minute until fragrant, but not browned.
Add Broth and Seasonings: Pour in chicken broth and lemon juice. Stir in Italian seasoning and red pepper flakes (if using). Let the sauce simmer for 2-3 minutes.
Cook Shrimp: Add shrimp to the skillet in a single layer. Cook 2-3 minutes on each side until shrimp turn pink and opaque.
Finish and Garnish: Toss shrimp to coat with sauce. Adjust seasoning with salt and pepper as needed. Sprinkle with chopped parsley.
Serve: Serve immediately over cooked pasta or with crusty bread to soak up the delicious sauce.