Go Back
+ servings

Blueberry Buttermilk Streusel Coffee Cake Squares

Soft and delicious blueberry coffee cake with a dusting of powdered sugar and a streusel topping.
Course Breakfast
Cuisine American
Keyword coffee cake for brunch, coffee cake recipe, easy coffee cake recipe for breakfast
Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Servings 16 servings
Calories 197 kcal


  • 1-1/2 cup all-purpose flour
  • 3/4 cup granulated sugar
  • 1/4 cup unsalted butter room temperature
  • 1 egg room temperature
  • 1/3 cup buttermilk room temperature
  • 1/4 cup Greek yogurt I used non-fat or substitute with sour cream
  • 2 tablespoons vegetable oil
  • 1 teaspoon pure vanilla extract
  • 1 teaspoon baking powder
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1-1/2 cup frozen blueberries can you fresh, see notes

Streusel Topping:

  • 1/2 cup all-purpose flour
  • 1/2 cup brown sugar firmly packed
  • 1 tablespoon turbinado sugar for extra crunch
  • 1 teaspoon cinnamon
  • 1/2 cup (1 stick) cold unsalted butter
  • powdered sugar for dusting the top of cake (optional)


  1. Preheat the oven to 350 degrees Fahrenheit

  2. Grease or line a 8x8 square pan with parchment paper.

Streusel Topping:

  1. In a medium bowl, whisk together the flour, brown sugar, turbinado sugar, and cinnamon.
  2. Cut in butter with pastry blender or two forks until well combined and mixture resembles course crumbs.
  3. Cake:

  4. In small bowl, whisk together the flour, baking powder, baking soda and salt together.
  5. In the bowl of the stand mixer or a large bowl using a hand mixer, cream together sugar and butter about 2-3 minutes. Add egg and buttermilk until incorporated. Add vanilla, Greek yogurt and oil. Mix until combined.
  6. Turn the mixer to low, add flour mixture and slowly stir until just incorporated.
  7. Pour into prepared cake pan. Sprinkle blueberries on top.
  8. Sprinkle the streusel topping on top
  9. Bake for 40-45 minutes or until a toothpick inserted into the center of the cake comes out clean.
  10. Allow to cool at least 10 minutes before cutting it into desired sizes and dust with powdered sugar.

Recipe Notes

If using fresh blueberries, the cooking time will be slightly less. Check the cake often after the 30-minute mark to be safe.

Nutrition Facts
Blueberry Buttermilk Streusel Coffee Cake Squares
Amount Per Serving (1 2x2 inch square)
Calories 197 Calories from Fat 90
% Daily Value*
Fat 10g15%
Saturated Fat 7g35%
Cholesterol 33mg11%
Sodium 134mg6%
Potassium 61mg2%
Carbohydrates 24g8%
Sugar 17g19%
Protein 1g2%
Vitamin A 290IU6%
Vitamin C 0.4mg0%
Calcium 31mg3%
Iron 0.5mg3%
* Nutrition facts are provided as a courtesy using the WPRM recipe calculator. It is best to make your own calculations to ensure accuracy. We expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website. Percent Daily Values are based on a 2000 calorie diet.