Dice your peaches into small uniform pieces.
In a small bowl, add corn starch and water, stir together until it becomes a paste. In a large pan add in peaches, brown sugar, and the water/corn starch mixture. cook on medium high heat and stir frequently. Cook for about 10 minutes or until your peach mixture thickens and becomes bubbly. Remove from the heat and then add in the vanilla extract.
Prepare your egg roll wraps by adding 1-2 heaping tablespoons of the peach mixture into the center of the wrapper. Wet the edges of the egg roll wrapper, then fold in the sides and roll, pressing the edges to close and making sure the egg roills are tightly wrapped so filling does not escape. Reroll with anothet wrapper to insure that filling will not escape. Repeat with the remaining wrappers until all 6 egg rolls are double wrapped.
In a small bowl, mix together the granulated sugar and cinnamon until well combined. Set aside.
Heat the vegetable oil on medium heat in a large frying pan. Once the oil starts to show small bubbles, it's ready for frying. Carefully add the peach eggrolls and fry for 3-4 mins on each side until crispy. Remove from the oil and set on a plate lined with paper towels to drain for 2 to 3 minutes.
Toss the egg rolls in the melted butter and cinnamon-sugar mixture and serve warm.