sour cream streusel coffee cake

Ingredients For sour cream streusel coffee cake

• 1 1/4 c

  coarsely chopped walnuts
• 1 1/4 c

  brown sugar, light (packed)
• 4 1/2 tsp

  ground cinnamon
• 4 1/2 tsp

  cocoa, unsweetened
• 6 Tbsp

  dried currants
• 3 c

  cake flour
• 1 1/2 tsp

  baking soda
• 1 1/2 tsp

  baking powder
• 3/4 tsp

  salt
• 3/4 c

  (1 1/2 stick) unsalted butter, room temp
• 1 1/2 c

  sugar
• 3 lg

  eggs
• 1 Tbsp

  vanilla extract
• 1

  (16oz) container sour cream
• GLAZE
• 1 c

  powdered sugar
• 1 Tbsp

  milk