Toast the pecan halves in a skillet over medium heat for 4–5 minutes until fragrant and lightly browned.

In a saucepan, combine brown sugar, water, maple syrup, and salted butter. Stir over medium heat until melted and dissolved.

Add toasted pecans to the mixture, bring to a rolling boil then reduce to a simmer for 5–10 minutes until thickened.

Remove from heat, stir in vanilla extract, let cool, then transfer to a jar for storage.