Heat milk in a small saucepan until it forms a skin but does not boil. Stir in 3 tablespoons of butter until it melts.
Mix corn and cornstarch in a large mixing bowl until cornstarch is dissolved. Add eggs, sugar, and seasonings. Mix into the milk and butter; add 6 crushed soda crackers.
Pour into a greased 1 1/2-2 qt baking dish. Crush 6 more soda crackers and sprinkle on top until covered; pour 2 Tbsp of melted butter over crackers.
Let stand for 1 hour, bake uncovered at 350 for 1 hour or until set in the middle.