This coffee cake recipe is a twist on classic pecan pie, with a moist and tender cake base and a crunchy pecan topping. The cake itself is made with brown sugar and buttermilk, and has a hint of cinnamon to complement the pecan flavor. The pecan topping is made with brown sugar, flour, and butter, and adds a delicious crunch to every bite. This coffee cake is perfect for a special occasion or as a sweet treat with your morning coffee.