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Calf's Liver and Onions, fried liver with roasted onions
Tender slices of calf's liver topped with sweet fried onions

Calf's Liver and Onions

Author: Flavelo
Recipes Main Courses
Calf's liver is the queen of offal: much finer texture and milder flavour than pork liver. The classic onion accompaniment is no accident: the sweetness of slowly caramelised onions perfectly balances the slightly metallic, earthy character of the liver. The most important rule: never overcook liver, or it becomes shoe-leather tough and grainy.
🕒 Prep Time 15 mins
🍳 Cook Time 20 mins
⌛ Total Time 35 mins
🍽️ Servings 4 servings
🔥 Calories 420 kcal
🌍 Cuisine International

Ingredients

Equipment Needed

  • Large frying pan (preferably cast iron or steel)
  • Tongs (for turning)
  • Kitchen paper

Allergen Information

⚠️ Cereals containing gluten
⚠️ Milk

Instructions

1 ✓

Slice the onions into half-moons. Start sautéing in a pan with olive oil and half the butter on low heat with a pinch of salt.

Tip: Salt helps release onion moisture, speeding up caramelisation (browning, sweetening).
2 ✓

While onions are cooking (approx 10-15 mins until golden brown), prepare the liver. Pat completely dry with kitchen paper, then coat in flour, shaking off excess.

Tip: Flour won't stick to wet liver, and it will steam instead of fry. A thin flour layer protects the liver's delicate structure from direct heat and helps crust formation.
3 ✓

Remove finished onions from pan and set aside. In the same pan, heat remaining butter on medium-high heat.

Tip: Butter gives best flavour, but careful not to burn it (browning is ok, black is not).
4 ✓

Add liver slices. Fry 2-3 minutes per side until nice brown crust forms but they stay springy inside.

Tip: Press with your finger: if very soft, it's raw. If hard, overcooked. Should be like tip of your chin when relaxed.
5 ✓

At very end of frying, season with salt and pepper, then sprinkle with lemon juice. Return onions for a minute to warm through.

Tip: Acid (lemon) 'cuts' the fatty sensation and freshens flavours.
6 ✓

Serve immediately, sprinkled with fresh parsley.

Tip: Liver hardens while cooling, so don't wait to serve.

Recipe FAQ

Why did the liver become tough?
You overcooked it. Liver must still be pinkish inside. 2-3 minutes per side is plenty.
When should I salt it?
Many debate this, but it's best to salt directly before or during frying. If salted beforehand and left to stand, salt draws out water (osmosis) and the result will be drier.
Did the onions become bitter?
You fried them on too high heat and they burnt. Caramelisation is a game of patience on low heat.

Ingredients

  • 500 g Calf's liver (membrane removed, approx. 1 cm thick slices)
  • 2 pcs Onions (sliced into half-moons)
  • 50 g Plain flour
  • 50 g Butter (cold)
  • 2 tbsp Olive oil
  • 1 tsp Salt
  • 0.5 tsp Freshly ground pepper
  • 10 g Fresh parsley
  • 1 tbsp Lemon juice