In a small saucepan heat butter, 1/4 c whipping cream, and brown sugar over low heat, only until the butter melts, NO LONGER!!!! Pour into 2 lightly greased 8 or 9 inch pans, and sprinkle evenly with pecans.
In large bowl, combine cake mix, eggs, water, and oil. Beat on low for 1 minute, and 2 min on high. Spoon gently over mixture in pans. Bake for 35-40 min, or until it springs up when touched. Cool for 5 min ONLY!! No longer, or they'll stick. Take them out and place on cooling racks or plates (pecan sides up), and cool completely.
topping
Beat whipping cream until it peaks, blend in sugar and vanilla, stack cakes together pecan sides up, and spread the topping on just like frosting. Place the whole pecans in a circle, and the chocolate curls between them. Cool for 10-15 minutes so topping can cool
Eat, and Enjoy