Prep the shrimp: Pat the shrimp dry with paper towels. Dry shrimp sear better and won’t steam in the pan.
Season both sides with a pinch of salt and pepper.
Preheat the pan: Heat a large skillet over medium-high. Add olive oil and 2 tablespoons butter. When the butter melts and starts to foam, you’re ready.
Sear the shrimp: Arrange shrimp in a single layer.
Cook 1–2 minutes per side, just until pink and slightly curled. Do not overcook. Transfer to a plate.
Sauté the garlic: Lower heat to medium.
Add the remaining 2 tablespoons butter to the skillet. Once melted, add minced garlic and red pepper flakes. Stir for 30 seconds, until fragrant.
Deglaze: Pour in the chicken broth or wine.
Scrape up any browned bits from the pan—this is flavor. Simmer 1–2 minutes to reduce slightly.
Add lemon: Stir in lemon zest and 2–3 tablespoons lemon juice. Taste and adjust with more lemon if you like it brighter.
Return shrimp: Add the shrimp back to the pan.
Toss to coat for 30–60 seconds, just to warm through. Finish with parsley and a few grinds of black pepper.
Serve: Spoon the shrimp and sauce over pasta, rice, or crusty bread. Add extra lemon wedges on the side.