Begin by preparing a baking sheet lined with parchment paper.

In a medium saucepan, combine sugar, water, and a pinch of salt. Stir over medium heat until the sugar dissolves completely.

Once the sugar has dissolved, add in the pecan halves. Stir well to coat them in the sugar mixture.

Keep cooking over medium heat, stirring frequently, until the mixture bubbles and thickens, about 8-10 minutes.

Before the pecans are done cooking, stir in the vanilla extract and cinnamon if using. Stir until the pecans are evenly coated and glossy.

Transfer the candied pecans onto the prepared baking sheet, spreading them into a single layer. Allow them to cool completely.

Once cooled, break apart any clusters that formed and store in an airtight container.