1. In a large bowl, whisk together the flour, sugar, baking powder, salt, and cinnamon (if using). In another bowl, beat the eggs, then add the milk and vanilla extract. Stir the wet mixture into the dry ingredients until just combined. Gently fold in the diced fresh peaches, being careful not to overmix the batter.

2. Heat about 2 inches of vegetable or canola oil in a heavy-bottomed pot or deep fryer to 350°F (175°C). This temperature is crucial for achieving the perfect crispy exterior and tender interior on your fresh peach fritters.

3. Using a spoon or small cookie scoop, carefully drop spoonfuls of the peach-studded batter into the hot oil. Fry a few at a time, being careful not to overcrowd the pot. Fry the fresh peach fritters for 2-3 minutes per side, or until they are golden brown and cooked through. Use a slotted spoon to transfer the fried fritters to a paper towel-lined plate to drain excess oil.

4. While the fresh peach fritters are still warm, prepare the simple glaze. In a small bowl, whisk together the powdered sugar, milk, and vanilla extract until smooth and pourable.

5. Dip or drizzle the warm fresh peach fritters with the homemade glaze, ensuring an even coating. The heat from the fritters will help the glaze melt and spread, creating a delectable sweet topping.