Slow Cooker Liver and Onions with Bacon Step-by-step instructions

Before you start

Before starting, slice the beef liver if it isn't already sliced, and pat it dry with paper towels. Cook the bacon in a skillet over medium heat until crisp, then drain on paper towels and chop into small pieces.

Slice the onion into thin half-moons. Measure the garlic pepper and beef broth. Have the slow cooker ready and plugged in. No need to preheat the slow cooker — it will heat up gradually during cooking.

Instructions

Layer and Season

1. 1Layer the Liver
   Place the sliced beef liver in the bottom of the slow cooker, overlapping slightly if needed. Spread the slices evenly so they cover the bottom in a single layer as much as possible.
   Look for The liver should cover the bottom of the slow cooker in a single layer.
   Tip If the liver slices are very large, cut them into smaller pieces to fit better.
2. 2Add Onions and Bacon
   Scatter the sliced onions over the liver, then sprinkle the chopped cooked bacon on top. The onions and bacon should cover the liver completely.
   Look for The onions form a layer over the liver, with bacon bits scattered throughout.
   Tip Use sweet yellow onions for the best flavor; they soften and caramelize during the long cook.
3. 3Season and Pour Broth
   Sprinkle the garlic pepper seasoning evenly over the onions and bacon. Pour the beef broth over everything, ensuring the liquid spreads evenly without washing the seasoning off the top.
   Look for The broth pools around the edges, and the seasoning dusts the top.
   Tip Do not stir after adding the broth; stirring can break up the liver.

The slow cooker insert holds a single layer of liver slices, topped with a scattered layer of onions and bacon. The garlic pepper dusts the top, and the beef broth pools around the edges. The raw liver is deep maroon, the onions are crisp and white, and the bacon bits are browned. Everything is in place, ready for the slow cooker to work its magic.

Slow Cook

4. 4Cook Low and Slow
   Cover the slow cooker and cook on low for 4 hours, or until the liver is tender and cooked through. The liver should reach an internal temperature of 145°F (63°C) for safety, but it will be more tender if cooked to 160°F (71°C). Let it rest for 3 minutes before slicing.
   Look for The liver is fork-tender and has turned a uniform brown color.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Cooking on low prevents the liver from becoming tough and rubbery.

After 4 hours on low, the kitchen smells of savory beef and smoky bacon. The liver has turned a uniform brown and is tender when pressed with a fork.

The onions are soft and translucent, having released their sweetness into the broth. The gravy is thin but fragrant, with a rich amber color. The liver should register at least 145°F (63°C) on an instant-read thermometer.

Rest and Serve

5. 5Rest and Serve
   Turn off the slow cooker and let the liver rest for 5 minutes before serving. Serve the liver with the onions, bacon, and gravy spooned over the top.
   Look for The gravy has thickened slightly and coats the back of a spoon.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Letting the liver rest allows the juices to redistribute, making it more succulent.

After resting, the liver is moist and fork-tender. The gravy has thickened slightly and clings to the onions and bacon. The dish looks rustic and comforting, with the liver nestled under a blanket of onions and bacon in a glossy brown sauce. Serve it hot, with the gravy spooned generously over each portion.

Common mistakes

One common mistake is cooking the liver on high, which can make it tough and rubbery. Always use the low setting for the full 4 hours. Another is overcrowding the slow cooker — if the liver slices are stacked too thickly, they may not cook evenly.

Use a single layer if possible. Also, avoid lifting the lid during cooking, as this releases heat and extends the cooking time. Finally, don't skip resting the liver before serving; it helps the juices redistribute.

How to tell it’s done

The liver is done when it's fork-tender and has lost its raw, red interior. To be safe, insert an instant-read thermometer into the thickest slice: it should read at least 145°F (63°C).

For a more tender texture, you can cook it to 160°F (71°C) — the liver will be fully cooked and still moist. The onions should be soft and translucent, and the gravy should be slightly thickened. If the liver is still firm in the center, cook for another 30 minutes and check again.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest