Blueberry-Cinnamon Coffee Cake
Updated April 15, 2025
- Total Time
- 1¼ hours, plus cooling
- Rating
- Comments
- Read comments
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Ingredients
- ½cup/65 grams all-purpose flour
- ¼packed cup/50 grams light brown sugar
- ¼cup/26 grams rolled oats
- 1¼teaspoons ground cinnamon
- ½teaspoon kosher salt
- ¼cup/57 grams unsalted butter, softened
- ¼cup/50 grams granulated sugar
- 2teaspoons ground cinnamon
- Nonstick cooking spray
- ¾cup/150 grams granulated sugar
- ½cup/115 grams unsalted butter, softened
- 2large eggs, at room temperature
- ½cup/120 grams sour cream
- 1teaspoon ground cinnamon
- 1teaspoon vanilla extract
- ¾teaspoon kosher salt
- 1½cups plus 1 tablespoon/203 grams all-purpose flour
- 1½teaspoons baking powder
- ¼teaspoon baking soda
- 1cup/140 grams fresh blueberries (or blackberries or raspberries)
For the Crumb Topping
For the Cinnamon Swirl
For the Cake
Preparation
- Step 1
Heat oven to 350 degrees and set a rack in the center. Spray an 8-by-8-inch square pan with cooking spray and line the pan with a strip of parchment paper that hangs over two sides.
- Step 2
Make the crumb topping: In a medium bowl, combine the flour, light brown sugar, oats, cinnamon and salt. Add the butter and squish it together with your fingertips until it’s evenly moistened, and pebble-size crumbs form.
- Step 3
Make the cinnamon swirl: In a small bowl, combine the granulated sugar and ground cinnamon; set aside.
- Step 4
Make the cake: In a large bowl, beat the sugar and butter together with an electric mixer on medium-high speed until light and fluffy, about 4 minutes. Add the eggs one at a time, mixing in one egg completely before adding the next. Add the sour cream, cinnamon, vanilla and salt, and beat to combine.
- Step 5
Stop the mixer and add the 1½ cups/195 grams flour, the baking powder and baking soda; mix on low speed until just combined. Toss the blueberries with the remaining 1 tablespoon flour, then gently fold them into the batter.
- Step 6
Assemble the cake: Spoon half the batter into the pan and smooth it to cover the bottom of the pan in an even layer. Sprinkle the cinnamon sugar evenly over the top of the batter. Spoon the remaining cake batter over the top and gently smooth it to cover the cinnamon sugar. Sprinkle the crumb topping over the top.
- Step 7
Bake the cake for 45 to 55 minutes until puffed and golden, and a tester inserted into the center comes out clean. Serve warm or at room temperature. Store the cake loosely wrapped at room temperature for up to 3 days.
Private Notes
Comments
ShaZAM! So tasty! We’ll definitely make this again and again. Tackled the “spreading chewing gum over dry sand” issue by evenly dropping globs of the second layer of batter on top of the cinnamon-sugar layer and then gently smoothing it out with the back of a wet spoon. Close to magical.
This recipe seems very promising (currently in the oven, smells great!) but "spoon remaining cake batter over the top" would be better described as "wrestle the batter over the top of the cinnamon sugar like you're trying to smooth chewing gum evenly over dry sand".
Lovely recipe! Made it with peaches and blueberries and substituted whole-wheat flour and 2% Greek yogurt for the all-purpose and the sour cream. Fantastic with coffee this morning!
This cake was good, not great. The topping was so dry I had to scrape it off. There wasn’t enough batter to even attempt to add the cinnamon sugar layer in the center either. The cake is good though, just skip the topping or find a better recipe for it so you get the pebbles of crunchy goodness instead of a desert of dry cinnamon dust. Or sprinkle the top with the cinnamon sugar meant for the center of the cake. Yeah, that would def work better.
Fantastic! Made it as written and used the wet offset spatula for the batter spreading. It is now my secret weapon for brunches!
After making the recipe as published many times I made a couple changes to delicious effect. Used maple sugar instead of brown sugar in the crumb topping, and maple sugar instead of granulated in the filling. I used the weight as published. Also made double the amount of topping. So good.