Instructions

  1. Preheat oven to 325°F.
  2. Coat a 12-cup Bundt pan with cooking spray; sprinkle with 1 tablespoon granulated sugar. Set aside.
  3. STREUSEL: Combine 1/4 cup flour and brown sugar in a small bowl; cut in 2 tablespoons butter with a pastry blender or 2 knives until mixture resembles coarse meal. Stir in coconut and pecans.
  4. CAKE: Combine cocoa and baking chocolate in a small bowl; add boiling water, stirring until chocolate melts. Set aside.
  5. Combine 1 1/2 cups granulated sugar and 1/3 cup butter at medium speed until well-blended, or about 5 minutes.
  6. Add vanilla and egg whites, 1 at a time, beating well after each addition.
  7. Combine 2 cups flour, baking powder, baking soda, and salt, stirring well with a whisk.
  8. Add flour mixture to sugar mixture alternately with buttermilk, beginning and ending with flour mixture.
  9. Stir in cocoa mixture.
  10. Spoon half of batter into prepared pan; top with streusel.
  11. Spoon remaining batter over streusel.
  12. Bake for 1 hour or until a wooden pick inserted in center comes out clean.
  13. Cool in pan on a wire rack 10 minutes before removing from pan to cool completely.
  14. GLAZE: Combine powdered sugar and butter in a small bowl. Add milk; stir with a whisk. Drizzle over cake.