Combine crumbs, ground pecans, margarine, brown sugar and cinnamon; press onto bottom and 1-1/2-inches up sides of 9-inch springform pan. Bake at 350F for 10 minutes.
Combine cream cheese, sugars and flour, mixing at medium speed on electric mixer until well blended. Add eggs, one at a time, mixing well after each addition. Blend in sour cream and chocolate; pour over crust. Bake at 350F for 55 minutes.
Loosen cake from rim of pan; cool before removing rim of pan. Chill. Combine brown sugar and margarine in small saucepan. Cook, stirring constantly, over medium heat until mixture boils and thickens; stir in chopped pecans. Pour onto greased cookie sheet; cool. Break into pieces; sprinkle over cheesecake,
Makes 10 to 12 servings.
Cajun Country -- New Iberia, Louisiana