レバーと玉ねぎ
Tender pan-seared beef liver draped in a heap of slow-caramelized onions and a quick Worcestershire pan gravy, with crisp bacon crumbled over the top. A milk soak softens the liver's mineral edge, and a fast, hot sear keeps the center just blush-pink so the slices stay silky instead of grainy. It's humble, deeply savory diner food that lives or dies on two things: sweet onions and not overcooking the liver.
Soak ½-inch (1.25 cm) beef liver slices in milk for 30 minutes to tame any bitterness, then crisp 4 slices of bacon in a heavy skillet and set aside. Cook two thinly sliced onions in the bacon fat plus a little butter over medium heat for about 20 minutes until deeply golden, then scoop them out. Pat the liver dry, dredge it in salted, peppered flour, and sear in oil and butter over medium-high for just 2 to 3 minutes per side so the center stays faintly pink (145–160°F / 63–71°C). Deglaze the pan with beef broth and a splash of Worcestershire, reduce to a light gravy, swirl in a knob of butter, and fold the onions back in; nestle the liver into the onions and gravy, crumble the bacon over the top, and rest a couple of minutes before serving over mashed potatoes.
- Buy the freshest liver you can and slice it no thicker than ½ inch (1.25 cm) so it cooks fast and evenly.
- Pull the liver at 145–160°F (63–71°C): a faint blush in the center means tender, while gray all the way through means overcooked and grainy.
- Caramelize the onions low and slow before the liver goes in — their sweetness is the whole point of liver and onions.
Equipment
- Large cast-iron or heavy stainless skillet
- Sharp chef's knife
- Cutting board
- Shallow dish for dredging
- Tongs
- Paper towels
材料
Liver & dredge
- 680 g beef liver, sliced ½ inch (1.25 cm) thick, use calf's liver for a milder flavor
- 480 ml whole milk, for soaking, buttermilk works too
- 90 g all-purpose flour
- 6 g kosher salt, divided
- 2 g freshly ground black pepper
- 2 g smoked paprika, optional, for the dredge
Onions & bacon
- large yellow onions, thinly sliced, about 500 g total
- thick-cut bacon, optional but classic
- 45 g unsalted butter, divided
- 30 ml neutral oil, such as canola
- garlic cloves, minced, optional
Pan gravy
- 240 ml low-sodium beef broth
- 15 ml Worcestershire sauce, contains anchovy
- fresh thyme, optional, or ½ tsp dried
作り方
- ステップ01
Rinse the liver slices, pat them dry, and lay them in a shallow dish. Pour over the milk so the slices are submerged, cover, and refrigerate for 30 minutes (up to 2 hours). The milk draws out some of the strong minerality and leaves the liver milder and cleaner-tasting.
- ステップ02
Lay the bacon in a cold heavy skillet and set it over medium heat. Cook, turning once, until the bacon is browned and crisp, about 8 minutes. Transfer to paper towels and pour off all but about 1 tablespoon of the rendered fat, leaving the browned bits in the pan.
- ステップ03
Add 1 tablespoon butter and the sliced onions to the bacon fat. Cook over medium heat, stirring every few minutes, until the onions collapse and turn deep golden, about 20–22 minutes; lower the heat if they darken too fast. Stir in the garlic for the last minute, season with ½ teaspoon salt, then scrape the onions onto a plate.
- ステップ04
Combine the flour, remaining 1 teaspoon salt, the pepper, and smoked paprika in a shallow dish. Lift the liver from the milk, letting the excess drip off, and pat it thoroughly dry. Dredge each slice in the seasoned flour and shake off the excess — a dry surface and a light coat are what give you a browned crust.
- ステップ05
Wipe the skillet, raise the heat to medium-high, and add the oil plus 1 tablespoon butter. When it shimmers, lay in the liver in a single layer (work in batches if needed). Sear undisturbed 2–3 minutes per side, until browned outside and just barely rosy at the center, 145–160°F (63–71°C). Do not crowd or overcook.
- ステップ06
Move the liver to a warm plate. Pour the beef broth and Worcestershire into the hot pan with the thyme, scraping up the browned fond. Simmer until slightly reduced and lightly thickened, about 4 minutes, then swirl in the last 1 tablespoon butter and return the onions to warm through.
- ステップ07
Nestle the liver back into the onions and gravy, spooning some over the top. Crumble the crisp bacon over everything and let it rest for 2–3 minutes so the juices settle. Serve hot, straight from the skillet.
Make ahead
The onions can be caramelized up to 2 days ahead and refrigerated, then rewarmed while you sear the liver. The milk soak can also be done in the morning and held in the fridge. For the best texture, dredge and cook the liver just before serving rather than in advance.
Storage
Refrigerate leftovers in an airtight container for up to 3 days. Reheat gently in a covered skillet with a splash of broth over low heat just until warmed through — high heat or long reheating will turn the liver rubbery. Freezing is not recommended, as the texture suffers.
Variations
Calf's Liver (Milder)
Swap the beef liver for calf's (veal) liver, which is paler, more delicate, and less minerally. It cooks even faster, so drop the sear to about 90 seconds per side and skip or shorten the milk soak.
Gluten-Free Dredge
Replace the all-purpose flour with an equal amount of rice flour or a 1-to-1 gluten-free flour blend, and use tamari in place of the Worcestershire (or a certified gluten-free Worcestershire). Everything else stays the same.
Smothered with Bacon-Mushroom Gravy
After caramelizing the onions, sauté 225 g (8 oz) sliced cremini mushrooms in the fat until browned, then build the gravy with an extra ½ cup broth for a thicker, smothered-style sauce over the liver and onions.
Serve with
Nutrition per serving
Nutrition values are estimates based on the metric measurements. Adjust as needed.
よくある質問
Why do you soak liver in milk?
Soaking the slices in milk for 30 minutes to 2 hours mellows the strong, iron-y taste that puts some people off liver and leaves it milder and cleaner. It also helps draw out any residual blood. Buttermilk works as well; just pat the liver very dry before dredging so it browns properly.
How do I keep liver and onions from turning tough?
Overcooking is the number one reason liver and onions goes wrong. Liver only needs 2–3 minutes per side over medium-high heat and should be pulled while the center is still faintly pink (145–160°F / 63–71°C). Slice it no thicker than ½ inch, don't crowd the pan, and take it off the heat the moment it firms up.
Should I use beef liver or calf's liver?
Both work. Beef liver is more affordable and has a robust, pronounced flavor; calf's (veal) liver is more tender and delicate but costs more. For classic diner-style liver and onions, beef liver is traditional — just buy the freshest, evenly sliced pieces you can find and give them the milk soak.
How do I know when the liver is done?
Go by feel and temperature rather than the clock. Properly cooked liver is springy but still gives slightly when pressed, with a faint blush at the center; an instant-read thermometer should show 145–160°F (63–71°C). If it's firm and gray throughout, it has gone past its tender window.
Can I make liver and onions ahead of time?
You can prep components ahead: caramelize the onions up to two days in advance and keep the liver in its milk soak until you're ready to cook. The liver itself is best seared just before serving, since reheating easily overcooks it. Warm any leftovers slowly with a splash of broth.
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