How to make seafood white pasta sauce with just flour cows milk butter and onions?

Make a simple seafood white pasta sauce using just flour, cow’s milk, butter, and onions — this forms a basic white sauce (béchamel-style) that pairs nicely with seafood.

Here’s how to do it:

Basic Seafood White Sauce (with just flour, milk, butter, and onions)

✅ Ingredients:

  • 2 tbsp butter
  • 1 small onion (finely chopped)
  • 2 tbsp all-purpose flour
  • 2 cups whole milk (or more for desired consistency)
  • Salt & pepper (optional, but highly recommended)
  • Cooked seafood (shrimp, crab, fish, etc.)

👨‍🍳 Instructions:

  1. Sauté the Onion:
    • In a saucepan over medium heat, melt the butter.
    • Add the chopped onion and sauté until translucent (about 5 minutes). Don’t let it brown — you want it soft and sweet.
  2. Make the Roux:
    • Add the flour to the onions and butter.
    • Stir constantly for 1–2 minutes to cook off the raw flour taste. The mixture should look like a thick paste (this is your roux).
  3. Add the Milk Slowly:
    • Gradually pour in the milk, whisking constantly to avoid lumps.
    • Bring to a simmer and continue stirring until it thickens (about 5–10 minutes).
    • If it gets too thick, add more milk to loosen it.
  4. Season (if available):
    • Add salt and pepper to taste.
    • (Optional) A pinch of garlic powder, paprika, or nutmeg can enhance the flavor if you have any on hand.
  5. Add Seafood:
    • Stir in cooked seafood of your choice. If it’s raw, simmer in the sauce until fully cooked (e.g., shrimp take 3–4 minutes).
    • Let it warm through, then serve over cooked pasta.

🍝 Tip:

This is a basic white sauce — adding cheese, garlic, lemon juice, or herbs like parsley or dill can make it even better, if available. But even with just your listed ingredients, it’s creamy and works beautifully with seafood.

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