Preheat oven to 350 degrees F

In a medium saucepan melt 3 tablespoon butter

Add flour and cook 1 minute.

Add salt, pepper, onion, and celery seed and stir

 Stirring constantly, add milk or stock and bring to a low boil

Reduce heat and simmer 3 to 4 minutes or until mixture thickens slightly.

Add this mixture in a medium bowl along with corn, sour cream, and cheese. Stir.

Pour into an oven safe dish

Combine 1/4 melted butter and crushed butter crackers.

Evenly spread cracker mixture over casserole.

Bake at 350 degrees F 25 to 30 minutes or until edges are bubbly and crackers are toasted.*See post above for substitution suggestions.