Pecan Sauce:
1 cup firmly packed light brown sugar
1/2 cup dark corn syrup
3/4 cup unsalted butter
1 & 1/2 cups chopped pecans, toasted

Biscuits:
4 cups all-purpose flour
2 tablespoons baking powder
1/2 teaspoon baking soda
1 & 1/2 teaspoons salt
1 cup very cold or frozen unsalted butter, cut into 16 pieces
1 & 1/2 to 2 cups buttermilk

Topping:
1/2 cup granulated sugar
1 teaspoon ground cinnamon
1/2 cup unsalted butter, melted