How to Make It
Preheat oven to 350°F. Combine syrup, butter, and vanilla in a medium skillet over medium. Cook, stirring, until bubbling, about 2 minutes. Add nuts and cook, stirring, until syrup reduces and coats nuts, about 4 minutes. Spread mixture on a parchment-lined baking sheet and sprinkle with salt. Transfer to oven and bake until syrup around nuts appears set, 10 to 12 minutes. Stir once and let cool completely. Nuts will keep in an airtight container at room temperature for up to 1 week.