Ingredients

Instructions

  1. Set oven to 350 degrees F.
  2. Grease a 13 x 9-inch baking pan.
  3. In a large mixing bowl, cream butter, sugar, vanilla and eggs for about 5 minutes.
  4. In a bowl, sift together flour, baking powder, baking soda and salt.
  5. Add the flour mixture along with the sour cream to the creamed mixture; mix until well combined.
  6. Stir in chocolate chips.
  7. Transfer to prepared baking dish, and smooth out batter.
  8. To make topping: mix together brown sugar, flour, cocoa and butter until crumbly.
  9. Stir in chocolate chips and nuts.
  10. Sprinkle the streusel mixture evenly over cake batter in the pan.
  11. Bake for about 35-40 minutes (do not overbake).
  12. Delicious!