From Cooking Pleasures, Feb/March 2008. Magazine decription reads: "A caramel glaze bakes beneath this tender coffee cake, becoming a tantalizing sticky topping studded with toasted pecans when the cake is inverted."
Heat oven to 350*. Spray 9x2" round baking pan with cooking spray. Line bottom of pan with parchment paper; spray paper.
Heat all topping ingredients except pecans in small saucepan over medium heat 5 minutes or until butter melts, stirring frequently. Pour into pan, coating bottom;sprinkle with pecans.
Beat 6 tbsp of butter in large bowl at medium speed until creamy. Add sugar and 1/3 cup brown sugar; beat 3 minutes or until light and fluffy. Beat in eggs and vanilla until blended.
Whisk flour, cinnamon, baking powder, baking soda and salt in medium bowl. At low speed, beat in flour mixture in 3 parts alternately with buttermilk, beginning and ending flour mixture. Spread batter over caramel layer.
Bake 40 to 45 minutes or until toothpick inserted in the center comes out clean and top is firm to the touch. Cool on wire rack 8 minutes. Invert onto serving plate; drizzle with any caramel remaining in the pan. Serve warm or at room temperature.