Fill a small pot with peaches, lemon juice, butter, brown sugar, cornstarch, and cinnamon.
Simmer for 10 minutes, stirring occasionally, until thickened. Add vanilla and chill.
Place a wrapper with one corner facing you on a clean surface. Moisten the borders. 2 tablespoons of cold peach filling.
Fold egg roll sides in while rolling to seal. Reuse the remaining wrappers.
Heat oil to 350°F. Fry egg rolls in batches till golden brown, 5-6 minutes.
Drain and chill egg rolls on a wire rack over paper towels. Upon cooling, sprinkle with powdered sugar.