Combine cornmeal and salt in a mixing bowl. Stirring constantly, gradually add boiling water, keeping smooth; stir in the melted butter.
In a separate bowl, beat eggs until thicken and pale in color. Add milk and beat to combine. Add milk and egg mixture to the cornmeal mixture with baking powder. Beat with an electric hand-held mixer or whisk to blend. Turn into a generously greased 8-inch square glass baking dish. Bake at 350° for about 30 minutes, until firm. Serve with plenty of butter.