Skip to content
Allquickyrecipes Search recipes

Dinner · Part 2 of 3: Instructions

Slow Cooker Salmon with Leeks and Cream Step-by-step instructions

A top-down view of salmon fillets, sliced leeks, and dollops of crème fraîche in a black slow cooker insert.
Prep
Cook
Total
Serves
4

Before you start

Before starting, ensure all ingredients are ready for assembly. Thoroughly wash the leeks, as they can often harbor dirt between the layers, and slice them into thin rounds.

Have the crème fraîche and bouillon cube measured and ready. Ensure the slow cooker is placed on a stable surface away from the edge of the counter and that the power cord is clear of any water sources or heat-sensitive materials.

Ingredients at a glance (4)
  • 4 fillets salmon fillets
  • 2 cups sliced leeks, cleaned
  • 1 cube bouillon cube, crumbled
  • 1/2 cup crème fraîche

Instructions

Base assembly

  1. Prepare the Slow Cooker Base
    Place the raw salmon fillets in the bottom of the slow cooker in an even layer. Ensure the fish is arranged so it can cook uniformly without overlapping too much.
    Look for Salmon fillets should be arranged in a single layer on the base of the slow cooker insert.
    Tip Ensure the slow cooker insert is clean and dry before adding the fish.

The salmon fillets should be arranged in a single, even layer at the bottom of the slow cooker. This ensures that the fish cooks at the same rate and absorbs the flavors from the ingredients added on top. Check that the fillets are not overlapping, as this would prevent the heat from circulating properly around each piece of fish.

Layering aromatics

  1. Layer Aromatics and Seasoning
    Scatter the sliced leeks over the salmon fillets. Distribute the crumbled bouillon cube evenly over the top of the leeks and fish to ensure the flavor permeates the ingredients during the cooking process.
    Look for Leeks should be spread evenly to cover the surface of the salmon.
    Tip Wash leeks thoroughly in cold water to remove any grit hidden between the layers.

The leeks should be spread evenly over the salmon, creating a blanket that will soften during the cooking process. Ensure the crumbled bouillon is distributed across the entire surface rather than in a single pile.

This layer of aromatics serves as a flavor base, protecting the salmon while infusing it with savory notes as the slow cooker heats up.

Cream integration

  1. Add Cream and Cook
    Drop spoonfuls of crème fraîche over the leeks and salmon. Cover the slow cooker and cook on low for 2 to 2.5 hours. Ensure the salmon reaches an internal temperature of 145°F (63°C) before serving.
    Look for The sauce should be bubbling gently and the fish should be opaque and flake easily with a fork.
    Safe temperature 145°F (63°C) internal temperature (fish)
    Tip Do not stir the contents while cooking to keep the salmon fillets intact.

The crème fraîche should be spooned over the top, ready to melt and combine with the juices released by the fish and leeks. Once the lid is on, the slow cooker will create a moist environment. At the end of the phase, the sauce will be creamy and the fish will be tender. Check that the salmon is opaque and flakes easily with a fork.

Common mistakes

A common mistake is using a slow cooker that is too large for the amount of fish, which can cause the sauce to evaporate too quickly or the fish to cook unevenly.

Another error is stirring the dish during the cooking process; the fish is very delicate and will break apart if disturbed. Finally, ensure the bouillon is crumbled finely to prevent concentrated salty spots in the final sauce.

How to tell it’s done

The salmon is perfectly cooked when it is opaque throughout and flakes easily when tested with a fork. It should reach a safe internal temperature of 145°F (63°C).

The leeks should be very tender and the sauce should have a creamy, slightly thickened consistency that clings to the fish. Avoid overcooking, as the texture of the salmon will become mealy if left in the slow cooker for too long.

  • Fish: 145°F (63°C) in the thickest part

Coming up in Part 3: common questions

  • Can this be made with frozen salmon?
  • Why does the sauce look separated?
  • Is it possible to overcook salmon in a slow cooker?

Also in Part 3: variations (Herb Infused, Spiced Leeks), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)