Cook macaroni according to package directions for al dente and drain it.
In a large pan add the milk and let it warm up.
Now add the sour cream, butter and the seasonings.
Cook and stir over medium-low heat until blended
Add the grated cheese and stir until melted.
Now grease the slow cooker and add the cooked macaroni.
Add in the cheese mixture and mix well.
Cover it and slow cook on low mode for about 2 hours.
Now mix well and add the bread crumbs before serving.
Notes
You can use 1 cup of milk and use 1 cheese soup can. Add any cheese of your choice and adjust the quantity accordingly.Adapted from http://www.tasteofhome.com/recipes/easy-slow-cooker-mac---cheese