Preheat the oven to 325 degrees. Line a baking sheet with parchment. Pour the pecans into a bowl and stir in the maple syrup and salt to coat.
Spread the pecan mixture in a single layer on the baking sheet and bake for 12 minutes. If you don't smell the delicious scent of toasted pecans, put them back for a couple minutes until you can. They should be toasted a nice golden color. Set them aside to cool a few minutes.
Plug in your food processor and put the cooled toasted pecans into the processor bowl. Process until smooth. Taste and adjust seasoning if needed. Process again. The pecan butter should be able to drip from a spoon when done.
Store in a jar or other food-safe sealed container and refrigerate for up to a few weeks.
I've tried to be as accurate as possible about the time it takes to make this recipe. Keep in mind that time is approximate and dependent on factors like how many hands are helping and the pace you choose to set. I hope you enjoy the process!