1In a small saucepan combine brown sugar,butter,2 T.milk.
Cook & stir over low heat until sugar is dissolved.Increase heat to medium. DO NOT STIR. cook for 3-6 minutes or until bubbles form in center & is amber brown.Remove from heat; stir in pecans. Cool to room temperature,stirring occasionally.
2Meanwhile bake cake according to package directions for 2-9" round cake pans.Cool 10 minutes before removing from pan to wire racks. Cool completely.
3In a bowl whisk pudding mix & remaining milk,until smooth.
fold in whipped topping.
Cover & refrigerate until thickened,about 20 minutes.
Place 1 cake layer on a serving plate;spread with 3/4 cup pudding mixture.
Top with remaining layer.Spreads remaining pudding mixture over top & sides of cake.
Spoon pecan mixture around top edge.
Store in refrigerator.