Melt the butter in a skillet over medium-high heat. Add the sugar and pecans and cook, stirring constantly, until the sugar dissolves and becomes.
Remove from the heat and add the vanilla and pecans, mix well. Pour the pecans onto the baking sheet in a single layer. Let cool for a minimum of 5 minutes. Chop to use in a salad or add the pecans to a serving dish for snacking!