Step 1

Heat butter over medium heat until melted. Saute onion and celery until translucent, approximately 5 minutes.

Step 2

Transfer to slow cooker. Stir in broth and baking soda.

Step 3

Combine corn starch and water in a bowl, then add to slow cooker.

Step 4

Stir in sauerkraut, milk, and corned beef.

Step 5

Cover and cook on High 4-5 hours.

Step 6

Season with salt and pepper.