Combine sugar and water in a saucepan, then add in the whole peaches.
Place the saucepan over a medium flame and stir occasionally until the sugar has dissolved.
Bring the mixture the boil, and boil for 2 minutes.
Switch off the heat and allow the syrup cool and let the peaches sit in the cooled syrup for 1-2 hours.
Strain and decant into a container and store the peach simple syrup inside the fridge.
Notes
For vibrant color, use the reddest skin peaches.
I make this peach syrup recipe with the orange flesh peaches, but feel free to use white peaches too.
Opt for peaches that are ripe and fragrant. The natural sugars in ripe fruit will infuse your syrup with a more intense and delightful flavor. Plus, it's a great way to use up peaches that are slightly overripe.
If you're looking for a more intense peach flavor, consider slicing or dicing the peaches before adding them to the sugar-water mixture. This increases the surface area in contact with the syrup, enhancing the infusion process.
Allow the peaches to sit in the cooled syrup for at least 1-2 hours after boiling. This gives the flavors a chance to mingle and intensify. The longer you let it sit, the more robust the peach essence will become.
Strain the syrup after the peaches have worked their magic. This ensures a smooth, velvety texture without any bits and pieces. A fine-mesh strainer or cheesecloth works wonders for this task.