Begin by boiling a pot of salted water. Add the linguine or spaghetti and cook according to package directions until al dente. Reserve 1/2 cup of pasta water before draining.
In a large skillet over medium heat, melt 2 tablespoons of butter and add 2 tablespoons of olive oil. Once hot, add the minced garlic and sauté for about 1 minute or until fragrant, being careful not to burn it.
Stir in the shrimp, red pepper flakes, and salt and pepper to taste. Cook for about 2-3 minutes on each side, or until the shrimp turn pink and opaque.
Once the shrimp are cooked, add the lemon zest and juice to the skillet, stirring to combine. If the mixture seems too dry, add a few tablespoons of the reserved pasta water to loosen it up.
Add the drained pasta to the skillet, gently tossing to coat it in the lemon garlic sauce. Stir in the remaining 2 tablespoons of butter until melted. Adjust seasoning if needed.
Plate the Lemon Garlic Shrimp Scampi in bowls or on plates. Garnish with freshly chopped parsley and sprinkle with grated Parmesan cheese if desired.
Notes
Adjust red pepper flakes based on heat preference.