Pecan Pie Cupcakes

Pecan Pie Cupcakes 1 box yellow cake mix, plus ingredients on back of box Pecan Pie Filling 1/4 cup granulated sugar 1/4 cup packed dark brown sugar 2 tablespoons cornstarch 3/4 cup light corn syrup 4 tablespoons butter, melted 1/2 teaspoon salt 2 eggs, lightly beaten 1 heaping cup chopped pecans 1 teaspoon vanilla extract Brown Sugar Frosting 3/4 cup packed dark brown sugar 1/4 cup water 1/4 teaspoon salt 1 1/2 cups unsalted butter, softened and divided 4 1/2 to 5 cups powdered sugar 1 tablespoon milk Bake 18 cupcakes according to box directions. Let cool. In a medium saucepan stir together all filling ingredients EXCEPT pecans and vanilla. Bring to a boil. Remove from heat and stir in pecans and vanilla. Pour into a bowl. Let mixture cool on the counter for 10 minutes and then refrigerate for 1 hour. Scoop out the center of each cupcake. Fill with filling. Make Frosting In a small saucepan, bring brown sugar, water, and salt to a boil. Cook for about 1 minute, stirring to dissolve sugar. Add 1/2 cup butter and stir until melted. Let mixture cool to room temperature. Combine cooled brown sugar mixture and remaining butter in the bowl of an electric mixer. Beat until smooth. Gradually beat in powdered sugar. Beat in milk. Using a piping bag fitted with a large tip, frost the cupcakes.