Instructions
Step 1
Make the vanilla sugar: In a food processor, pulse the sugar and vanilla seeds until combined. Transfer to a jar, bury the reserved pod in it, and cover tightly. (The sugar can be used right away, but it can also be stored at room temperature for up to 1 year.)
Step 2
Make the apple fritters: In a large bowl, whisk together the flour, sugar, baking soda, and salt. Add the milk and whisk until smooth.
Step 3
Into a large skillet, pour the oil to a depth of ½ inch and turn the heat to medium-high. When it’s hot and shimmering, working in batches, dip the apple rings into the batter, let the excess drip off, and carefully slide them into the oil. Fry until golden brown, 2–3 minutes per side. Using tongs or a spider skimmer, transfer to a paper towel-lined plate. Sprinkle with the vanilla sugar and serve immediately. (Reserve the remaining vanilla sugar for another use.)