Melt morsels over hot (not boiling) water (or in the microwave); cool. Combine cream cheese and milk. Stir in morsels; set aside.
Combine flour, sugar, baking soda, and baking powder. Cut in butter until mixture resembles fine crumbs. Combine eggs, buttermilk and vanilla; stir into flour mixture just to moisten. Spread HALF the batter into a greased 9x13. Spread with morsel mixture. Spoon remaining batter over the top.
Sprinkle with crumb topping. Bake at 350 degrees for 40-45 minutes. Topping: Combine flour and sugar; cut in butter until mixture resembles fine crumbs. stir in pecans.