Pecan Filling
In a medium saucepan over medium heat, melt the unsalted butter. Stir in the brown sugar, maple syrup, and a pinch of salt. Cook, stirring constantly, for 2-3 minutes until the mixture is bubbling and slightly thickened. Remove from heat and stir in the bourbon or rum, vanilla extract, and flour until smooth. Mix in the chopped pecans and set aside to cool slightly.