Blueberry Skillet Coffee Cake with Brown Sugar Oat Streusel

By Marge Perry & David Bonom
Bring this moist, tender cake to the table right in the skillet—it looks as homey and beautiful as it tastes. Don’t worry if fresh blueberries aren’t available—this cake works well with thawed frozen berries, too.
  • Course: Dessert


  • All Purpose Flour
  • Almond extract
  • Baking powder
  • Baking soda
  • Cake:
  • eggs
  • Fresh Blueberries
  • granulated sugar
  • Ground cinnamon
  • Light brown sugar
  • old fashioned rolled oats
  • Salt
  • sour cream
  • Streusel:
  • unsalted butter
  • walnuts


  1. Preheat the oven to 350°
  2. For the topping, combine the sugar, oats, flour, walnuts and cinnamon in a bowl. Add the butter and rub it into the sugar mixture until well combined and clumps form when pressed together.
  3. Generously butter the bottom and sides of a 12-inch cast iron skillet.
  4. Combine butter and sugar in the bowl of an electric mixer and beat on high speed with the paddle attachment until light and fluffy, 2-3 minutes. Whisk together the eggs, sour cream and almond extract in a bowl then add to the sugar mixture and beat on medium speed, stopping and scraping down the sides of the bowl occasionally, until combined. In a separate bowl combine the flour, baking powder, baking soda and salt. Add flour mixture to the sugar mixture and beat on low speed until just moistened, about 1-2 minutes.
  5. Spread half of the batter in the bottom of the prepared skillet. Top with a layer of the blueberries then sprinkle on 1/3 of the streusel mixture in an even layer. Spread the remaining batter over the filling. Sprinkle with the remaining streusel.
  6. Bake, rotating the pan every 15 minutes, until the cake is golden brown and a cake tester inserted into the center comes out clean, about 50-55 minutes. Let cool at least 20 minutes before cutting into wedges to serve.