In a bowl, mix the milk and cornmeal together. Set aside for 10 minutes to allow the cornmeal to soften. Then mix in eggs one at a time.
Mix all dry ingredients together in another bowl. Add in the cornmeal mixture and the cooled melted butter and zest. Whisk together until smooth. Allow to sit for about 5 minutes so batter can thicken (if too thick, add 1/4 cup more milk).