Preheat and prepare: Heat your oven to 400°F (200°C). Pat the shrimp very dry with paper towels and season with salt and pepper.
Build the sauce: In a large oven-safe skillet over medium heat, melt 4 tablespoons butter with the olive oil.
Add the garlic and cook for 30–45 seconds until fragrant but not browned.
Deglaze: Pour in the wine (or broth) and simmer 2–3 minutes to reduce slightly. Stir in the lemon zest, lemon juice, and red pepper flakes.
Add shrimp: Nestle the shrimp into the sauce in an even layer. Spoon some sauce over the top so every shrimp gets coated.
Toss in extras: Add the capers if using.
Scatter half the parsley over the shrimp.
Make a quick topping: In a small bowl, mix the remaining 2 tablespoons melted butter with the almond flour and Parmesan until crumbly. Season lightly with salt and pepper.
Top and bake: Sprinkle the topping over the shrimp. Transfer the skillet to the oven and bake 8–10 minutes, until the shrimp turn pink and opaque.
Broil for color: If you’d like a golden top, switch to broil for 1–2 minutes.
Watch closely to avoid burning.
Finish and serve: Remove from the oven, sprinkle with remaining parsley, and taste for seasoning. Serve right away over zucchini noodles, cauliflower rice, or alongside roasted veggies.