Place a 10-inch cast-iron skillet on a middle rack in the oven and preheat to 425°F (220°C).
In a blender, combine the eggs, warm milk, flour, maple syrup, orange zest, orange juice, cinnamon, and salt. Blend on high for 30-45 seconds, or until the batter is completely smooth and frothy. Let the batter rest at room temperature for at least 20 minutes.
Carefully remove the hot skillet from the oven. Add the butter to the skillet and swirl it around until it melts and coats the bottom and sides of the pan.
Scatter the cranberries in an even layer across the bottom of the skillet. Pour the rested batter over the cranberries.
Immediately return the skillet to the oven. Bake for 15 to 20 minutes, until the pancake is puffed, golden brown, and cooked through. The center should be set and an instant-read thermometer inserted should register at least 160°F (71°C).
Carefully remove the skillet from the oven. The Dutch baby will begin to deflate, which is normal. Dust with powdered sugar.
Slice into wedges and serve immediately with an extra drizzle of maple syrup.