Add all ingredients to a large pan over medium heat. Stir and bring the maple syrup to a simmer. Once simmering, reduce the heat to low.

Continue cooking on low for 20 minutes, stirring every couple of minutes. After 20 minutes, the maple syrup should begin to crystalize and look like sugar coating the pecans.

Once syrup has crystalized, pour the pecans onto a parchment-lined baking sheet. Spread pecans into an even layer, then let cool completely before eating or storing.