Blueberry Sour Cream Coffee Cake

5 from 10 votes

Indulge in this Blueberry Sour Cream Coffee Cake laden with fresh blueberries and crowned with a thick, crumbly streusel topping.

Prep Time15

Cook Time45

Total Time1

Course: Breakfast, brunch, Dessert

Cuisine: American

Servings: servings

Calories: 447kcal

Author: Rachel

Cost: $12

For the crumb topping, stir together the 1 cup All Purpose Flour, 3 tbsp Brown Sugar,2 tbsp White Sugar, 1 tsp Baking Powder, and 1 tsp Cinnamon. Using a pastry blender or your hands, mix in 5 Tbsp Butter (melted) until the streusel is crumbly and well mixed.

Preheat oven to 350°F. Grease an 9x9 pan or a 9-inch springform pan or 9-inch square cake pan. It's better to cover the bottom with parchment paper after greasing for best release.
In a large bowl for an electric or stand mixer, add 1 ½ cup All-Purpose Flour, ½ cup White Sugar, ½ cup Light Brown Sugar, ½ tsp Baking Soda,1 tsp Baking Powder¼ tsp Salt, and ½ tsp Ground Cinnamon. Mix at medium-low speed until combined.
Add ½ cup Butter to the flour mixture, 1 tablespoon at a time, not adding the next tablespoon until the previous has been well mixed. Once all the butter has been added, mixture will resemble coarse sandy crumbs.
In a separate bowl, whisk together 2 tbsp Vegetable Oil, 1 cup Sour Cream, 2 Eggs, and 1 tsp Vanilla Extract until mostly smooth. Turn mixer speed to low and slowly add the wet mixture into batter. Stir to combine, scraping the sides and bottom as needed, but don't overmix. Gently fold in 1 cup of Blueberries.

Spread the batter evenly in the pan. Sprinkle the rest of the blueberries over the top and push in just a little.
Sprinkle the remaining crumb topping. You want a mixture of larger chunks and finer crumbs for the best texture of crumb topping.
Bake 50-60 minutes or until the streusel topping is browned and the center is firm. Allow to cool 10 minutes at least and skim a knife around the edge to help release.
After cooling. mix together 2 cups Powdered Sugar and 2 Tbsp Milk in a small bowl for the glaze and drizzle over the cake, if desired.