In a shallow baking dish whisk the milk, pumpkin puree, eggs, light brown sugar, salt, vanilla extract, pumpkin pie spice, and cinnamon together until combined.
¾ cup milk, ½ cup pumpkin puree, 3 eggs, 2 tablespoon light brown sugar, ½ teaspoon salt, 1 teaspoon vanilla extract, 1 teaspoon pumpkin pie spice, ½ teaspoon cinnamon