Refer to the illustrations below when layering the batter and streusel in the pan. A fixed-bottom, 10-inch tube pan (with 10-cup capacity) is best for this recipe. Note that the streusel is divided into two parts—one for the inner swirls, one for the topping.

ready in about an hour and 20 minutes; serves 12
You might need to buy:
  • Streusel
  • ground cinnamon
  • Cake
  • large eggs
  • sour cream
  • vanilla extract
  • baking powder
  • baking soda
  • table salt