Add the kielbasa to a 6 quart crock pot. Pour the drained sauerkraut on top.
Then top with the onions, minced garlic, brown sugar, spicy brown mustard, salt and pepper.
Pour the beer on top. Cover and cook on low for 4-5 hours or on high for 2-3 hours.
Serve warm and enjoy!
Notes
Refrigerate the leftovers in an airtight container for up to 5 days. You can use chicken broth or apple juice instead of beer in this recipe if you prefer.
Expert Tips
Sauerkraut - We recommend draining the sauerkraut because of how tart the Sauerkraut is. To make it even less tart, rinse the sauerkraut before adding it in the slow cooker.
Onion and Garlic - We make things easy but just tossing the garlic and onion in the slow cooker, but if you prefer you can sauté them before adding.
Kielbasa - The kielbasa we used is the smoked kielbasa. You can also use bacon or other types of pork.
Seasoning - We used simple seasoning, but they can be changed to what you have hand.