Line an 8×8-inch pan with parchment paper.
Add the sugar, part of the measured water, and lemon juice to a saucepan.
Heat gently while stirring until the sugar is completely dissolved.
Bring the syrup to a steady boil.
In a separate bowl, whisk the 100 g cornstarch with the remaining water until completely smooth.
Gradually whisk the cornstarch mixture into the hot sugar syrup.
Reduce the heat to maintain steady cooking without scorching.
Continue cooking and stirring frequently until the mixture becomes very thick, glossy, translucent, and heavy.
The total stovetop Cook Time is approximately 1 hour.
Stir in the rose water, vanilla, and optional food coloring.
Immediately transfer to the prepared pan.
Smooth the surface.
Leave at room temperature for approximately 6 hours, or until fully set.
Mix the powdered sugar and 32 g cornstarch.
Dust a clean cutting surface with some of the coating.
Lift the set Turkish delight from the pan.
Cut into approximately 36 cubes.
Roll every cube thoroughly in the powdered sugar-cornstarch mixture.
Serve or transfer to an airtight container with extra coating between layers.