Add shrimp to the skillet in a single layer, season with salt and pepper, and cook for about 2 minutes on one side until opaque. Flip and cook for another minute until fully cooked.
Pour in heavy cream and chicken broth, stirring gently to combine. Allow the mixture to simmer for about 3-5 minutes until slightly thickened.
Gradually stir in grated Parmesan cheese until melted and smooth. If using, add red pepper flakes and simmer for an additional minute.