In a small saucepan, melt the butter, brown sugar, maple syrup, cinnamon, nutmeg, ginger, and salt over medium heat, stirring often. Once melted, bring to a boil. Boil for 2 minutes. Remove from the heat and stir in the vanilla.
½ cup unsalted butter, 1 cup brown sugar, ¼ cup pure maple syrup, 1 teaspoon ground cinnamon, ½ teaspoon ground nutmeg, ¼ teaspoon ground ginger, ½ teaspoon kosher salt, 1 tablespoon pure vanilla extract