Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper and set aside.
In a large bowl, stir together the melted butter, maple syrup, brown sugar, molasses, vanilla, ginger, cinnamon, cloves, nutmeg, and salt until smooth and combined.
Add the pecans to the bowl and toss until fully coated in the spiced mixture.
Spread the coated pecans evenly on your prepared baking sheet. Roast for 7 minutes, give them a good stir, then roast for an additional 3–5 minutes — keeping a close eye toward the end so they don’t burn.
Once roasted, use a spatula to spread out the pecans so they don’t stick together as they cool.
Let cool completely before serving or storing. They’ll crisp up as they cool.
Once cooled, store the candied pecans in an airtight container at room temperature for up to 1 week.