Creating a Cinnamon Sugar Peach Dutch Baby is straightforward and can be broken down into easy steps. Follow these instructions for a delicious outcome:

1. Preheat the Oven: Preheat your oven to 425°F (220°C).
2. Prepare Baking Dish: Place a large cast-iron skillet or oven-safe baking dish in the oven to heat up.
3. Whisk Eggs: In a mixing bowl, whisk together the eggs until frothy.
4. Add Milk: Pour in the whole milk and continue whisking until well combined.
5. Add Dry Ingredients: Gradually add the flour, granulated sugar, and salt. Mix until just combined; be careful not to overmix.
6. Add Vanilla: Stir in the vanilla extract for extra flavor.
7. Melt Butter: Carefully remove the hot skillet from the oven and add the unsalted butter. Swirl it around until melted.
8. Pour Batter: Immediately pour the batter into the hot skillet over the melted butter.
9. Add Peaches: Arrange the sliced peaches evenly over the batter.
10. Sprinkle Sugar: In a small bowl, mix together the brown sugar and ground cinnamon. Sprinkle this mixture over the peaches.
11. Bake: Return the skillet to the oven and bake for 20-25 minutes, or until the edges are golden brown and puffed up.
12. Cool Slightly: Remove from the oven and let it cool for a few minutes before dusting with powdered sugar if desired.
13. Slice and Serve: Cut into wedges and serve warm.

Following these steps will yield a fluffy, flavorful Cinnamon Sugar Peach Dutch Baby that will be the star of your breakfast or brunch table.