Preheat Oven: Preheat oven to 425°F (220°C). Grease a popover pan or muffin tin generously with melted butter.
Prepare Batter: In a mixing bowl, whisk together milk, eggs, and melted butter. Gradually add flour and salt, whisking until smooth. Let batter rest for 10 minutes.
Fill Pan: Pour batter into prepared pan, filling each cup about 2/3 full.
Bake: Bake at 425°F (220°C) for 15 minutes. Reduce temperature to 350°F (175°C) and bake an additional 15–20 minutes until golden brown and puffed.
Add Cinnamon Sugar: Brush warm popovers with melted butter and sprinkle generously with cinnamon sugar.
Serving and Storage Tips:
