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Dinner · Part 2 of 3: Instructions

Slow Cooker Maple Mustard Kielbasa Step-by-step instructions

A close-up of glossy maple mustard glazed kielbasa and sliced onions served over buttery egg noodles on a white plate.
Prep
Cook
Total
Serves
4

Before you start

Before starting, ensure your slow cooker is clean and positioned on a stable, heat-resistant surface. Have your kielbasa sliced into uniform pieces and your onions sliced into thin strips.

Prepare the maple mustard glaze in a separate small container so it is ready to pour as soon as the other ingredients are layered. Having these components ready makes the assembly process incredibly quick and efficient.

Ingredients at a glance (4)
  • 1 lb kielbasa sausage, cut into bite-sized chunks
  • 1 large sweet onion, sliced
  • 1 tsp garlic powder
  • 1/2 cup maple mustard glaze

Instructions

Layering the ingredients

  1. Prep the slow cooker
    Place the sliced kielbasa chunks into the base of the slow cooker. Scatter the sliced sweet onions evenly over the top of the sausage to ensure they cook down into the sauce.
    Look for The slow cooker base is covered with a single layer of sausage and onions.
    Tip Ensure the sausage pieces are roughly the same size for even cooking throughout the process.

At this stage, the slow cooker should be filled with uniform kielbasa pieces and sliced onions.

The onions should be spread evenly over the sausage to ensure they soften and incorporate their sweetness into the base of the dish during the slow cooking cycle, providing the foundation for the final flavor profile.

Seasoning and glazing

  1. Season and glaze
    Dust the garlic powder over the onions and sausage. Whisk the maple mustard glaze in a measuring cup until smooth, then pour it evenly over the contents of the slow cooker.
    Look for The glaze covers the ingredients thoroughly.
    Tip Use a small whisk to ensure the glaze components are fully emulsified before pouring.

The garlic powder should be dusted evenly over the top, followed by the maple mustard glaze. Ensure the glaze covers the mixture thoroughly. At this point, the slow cooker is ready to be covered, trapping the moisture and aromatics inside to begin the slow infusion process that defines this recipe.

Final cooking and service

  1. Cook and serve
    Cover the slow cooker and set it to low for four hours. Once the time is up, ensure the sausage has reached an internal temperature of 160°F (71°C) before serving over prepared egg noodles.
    Look for The sausage is glossy and the onions are tender.
    Safe temperature 160°F (71°C) internal temperature (ground meat)
    Tip Stir the mixture gently before serving to incorporate the thickened glaze with the noodles.

The kielbasa should be piping hot, glossy, and coated in the reduced glaze. The onions will be tender and sweet. Before serving over your bed of egg noodles, verify the temperature and give the mixture a final, gentle stir to ensure the sauce is perfectly distributed across all the components.

Common mistakes

A common mistake is overcrowding the slow cooker with too many ingredients, which can prevent the onions from cooking down properly into the sauce. Another error is failing to ensure the sausage chunks are of a consistent size, which leads to some pieces overcooking while others remain under-seasoned.

Finally, avoid lifting the lid frequently during the cooking process, as this releases essential heat and steam, significantly increasing the total cooking time required.

How to tell it’s done

The dish is ready when the kielbasa is heated through and the onions have become soft and translucent. Using a meat thermometer, verify the internal temperature of the sausage has reached 160°F (71°C).

The sauce should be slightly thickened and glossy, coating the sausage and onions evenly. If the sauce appears too thin, you can remove the lid for the final thirty minutes of cooking to allow it to reduce.

  • Ground meat: 160°F (71°C) in the thickest part

Coming up in Part 3: common questions

  • Can this be made ahead of time?
  • What is the best type of sausage to use?
  • How can the sauce be made thicker?

Also in Part 3: variations (Spicy Maple Mustard, Apple and Kielbasa), 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)