Cinnamon Sugar Dutch Baby

Bahan-bahan (6 porsi)

• 2/3 cup flour
• 2/3 cup milk
• 4 eggs
• 2 teaspoons vanilla extract
• 2 1/2 tablespoons cold butter (divided)
• 1/3 cup granulated sugar
• 2 teaspoons cinnamon
• 2 tablespoons butter (melted)