Arrange 1 cup pecans in a single layer on a baking sheet. Bake at 350° for 5 to 7 minutes or until toasted. Cool on a wire rack 15 minutes or until completely cool. Reduce oven temperature to 325°.
Beat butter and cream cheese at medium speed with an electric mixer until creamy. Gradually add brown sugar, beating until well blended. Add eggs, 1 at a time, beating just until blended after each addition.
Sift together 2 1/2 cups flour and next 3 ingredients. Add to butter mixture alternately with sour cream, beginning and ending with flour mixture. Beat batter at low speed just until blended after each addition. Stir in toasted pecans and vanilla. Spoon batter into a greased and floured 12-cup Bundt pan.
Bake at 325° for 1 hour and 15 minutes or until a long wooden pick inserted in center comes out clean. Cool cake in pan on a wire rack 15 minutes; remove from pan to wire rack, and let cool 30 minutes or until completely cool.
Prepare Praline Icing, and spoon immediately over cake. Sprinkle top of cake with Sugared Pecans.