Best Blueberry Coffee Cake

There is no morning ritual quite as comforting as a hot cup of coffee paired with a slice of cake that is allowed to be eaten for breakfast. This Blueberry Coffee Cake is the ultimate morning treat. Max calls it the "purple pokadot cake" because it is absolutely loaded with bursting fruit. Unlike dry, crumbly versions you might find at a coffee shop, this recipe uses sour cream to ensure a tender, moist crumb that melts in your mouth, all crowned with a buttery, cinnamon-spiced streusel topping.

A moist and tender breakfast cake made with sour cream and fresh blueberries, topped with a crunchy cinnamon streusel.

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Why You Will Love This Blueberry Coffee Cake

This recipe strikes the perfect balance between a buttery vanilla cake and a fruit tart. It is incredibly moist thanks to the addition of sour cream, which creates a dense yet soft texture that supports the weight of the berries. The contrast is stunning: the soft, sweet cake, the tart explosions of warm blueberries, and the crunchy, sandy texture of the cinnamon crumble on top. It’s rustic, easy to assemble, and makes your kitchen smell like a bakery.

How To Make Blueberry Coffee Cake

To achieve the thick, square slices seen in the photo, we bake this in a square pan rather than a bundt. We start by making a simple streusel topping with cold butter, flour, and cinnamon. For the batter, we cream butter and sugar until fluffy, then beat in eggs and sour cream for richness. We gently fold in fresh blueberries—tossing them in a little flour first so they don't sink—and bake it until the crumb topping is golden and the fruit is bubbling.

Blueberry Coffee Cake Ingredients

The Cinnamon Streusel Topping

• ½ cup all-purpose flour
• ⅓ cup granulated sugar
• ⅓ cup brown sugar (packed)
• 1 teaspoon ground cinnamon
• 4 tablespoons unsalted butter (cold, cubed)

The Moist Cake Base

• 2 cups all-purpose flour (plus 1 tablespoon for coating berries)
• 2 teaspoons baking powder
• ½ teaspoon salt
• ½ cup unsalted butter (softened)
• ¾ cup granulated sugar
• 2 large eggs (room temperature)
• 1 teaspoon vanilla extract
• ½ cup sour cream (full fat is best)
• 2 cups fresh blueberries (rinsed and dried)

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Step by Step Method

Make the Streusel

• In a small bowl, whisk together the flour, granulated sugar, brown sugar, and cinnamon.
• Cut in the cold butter using a fork or your fingers until the mixture looks like coarse wet sand with some pea-sized clumps. Set aside in the fridge.

Mix the Dry Ingredients

• Preheat oven to 350°F (175°C). Grease and flour an 8x8 or 9x9 inch square baking pan (or line with parchment paper).
• In a medium bowl, whisk together the 2 cups of flour, baking powder, and salt.

Make the Batter

• In a large bowl or stand mixer, beat the softened butter and sugar together on medium-high speed until pale and fluffy (about 3–4 minutes).
• Add the eggs one at a time, beating well after each. Scrape down the sides of the bowl.
• Mix in the vanilla extract and sour cream until combined.
• Gradually add the dry ingredients to the wet ingredients, mixing on low speed just until the flour disappears. The batter will be thick.

Fold and Assemble

• Toss the blueberries with the remaining 1 tablespoon of flour (this prevents them from sinking to the bottom).
• Gently fold the berries into the batter using a spatula, being careful not to crush them.
• Spread the batter evenly into the prepared pan.
• Sprinkle the streusel topping generously over the entire surface.
• Scatter a few extra fresh blueberries on top of the streusel for presentation.

Bake

• Bake for 40–50 minutes, or until a toothpick inserted into the center comes out clean (moist crumbs are okay, but no raw batter).
• Let cool in the pan for at least 20 minutes before slicing into squares.

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Max’s Reaction: "I love picking the big crunchy crumbs off the top! The blueberries pop in your mouth like warm jelly."

What Pairs Well With Blueberry Coffee Cake

Obviously, coffee is the best friend of this cake. A medium roast with a splash of cream complements the cinnamon notes perfectly. For a weekend brunch, serve this alongside savory items like scrambled eggs or bacon to balance the sweetness. It is also delicious served warm with a dollop of vanilla yogurt or whipped cream.

Blueberry Coffee Cake Variations

Lemon Blueberry

• Rub 1 tablespoon of fresh lemon zest into the sugar before creaming it with the butter. The citrus oil brightens the flavor and highlights the berries.

Mixed Berry

• Substitute half of the blueberries for raspberries or blackberries. Just keep the total fruit volume to 2 cups.

Almond Crunch

• Add ¼ cup of sliced almonds to the streusel topping for an extra nutty crunch.

Loaf Style

• You can bake this in a standard 9x5 loaf pan, but you will need to increase the baking time to 55–65 minutes.

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Equipment

• 8x8 or 9x9 Square Baking Pan
• Electric Mixer
• Mixing Bowls
• Rubber Spatula

Storage / Make Ahead / Serving Tips

Storage Tips That Keep It Fresh

Store the cake covered at room temperature for up to 2 days. For longer storage, keep it in the refrigerator for up to 5 days. The moisture from the berries keeps it fresh longer than most cakes.

Make Ahead Strategy

You can make the streusel topping up to 3 days in advance and keep it in the fridge. You can also bake the cake the night before; the flavors actually meld and improve by the next morning.

Freezing Instructions

This cake freezes beautifully. Wrap individual squares in plastic wrap and then foil. Freeze for up to 3 months. Thaw at room temperature or warm gently in the microwave.

Blueberry Coffee Cake Frequently Asked Questions

A Cozy Morning Essential

This cake is simple, rustic, and incredibly satisfying. It turns a standard breakfast into a special occasion. If you are looking for more sweet treats to fill your holiday or weekend table, try the fun Harry Potter Butterbeer Popcorn for a movie marathon, or the elegant White Chocolate Raspberry Yule Log for a festive centerpiece. For a bite-sized indulgence, our White Chocolate Raspberry Fudge is always a winner.

Share your Blueberry Coffee Cake! Tag us @HannahCooking with #BlueberryCoffeeCake; we’re dying to see your version and hear about your homemade kitchen stories!

⭐️ Rate this Blueberry Coffee Cake recipe and let us know what twists or ingredients you used!

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Blueberry Coffee Cake

A moist and tender breakfast cake made with sour cream and fresh blueberries, topped with a crunchy cinnamon streusel.

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Course: Breakfast, Dessert

Cuisine: American

Prep Time: 15 minutes minutes

Cook Time: 45 minutes minutes

Total Time: 1 hour hour

Servings: 9 square

Calories: 380kcal

Cost: $10

Equipment

• 1 Square Baking Pan (8x8 or 9x9 inch)
• 1 Electric mixer (Hand or stand)
• 2 Mixing bowls (Medium and large)

Ingredients

• ▢ 2 cups all-purpose flour - Plus 1 tablespoon for berries
• ▢ 2 teaspoon baking powder - Leavening
• ▢ ½ teaspoon salt - Balance
• ▢ ½ cup butter - Softened, for cake
• ▢ ¾ cup granulated sugar - For cake
• ▢ 2 large eggs - Room temperature
• ▢ ½ cup sour cream - Full fat
• ▢ 1 teaspoon vanilla extract - Flavor
• ▢ 2 cups fresh blueberries - Rinsed and dried
• ▢ ½ cup all-purpose flour - For streusel
• ▢ ⅓ cup brown sugar - Packed, for streusel
• ▢ ⅓ cup granulated sugar - For streusel
• ▢ 1 teaspoon cinnamon - Ground
• ▢ 4 tablespoon butter - Cold, cubed for streusel

Instructions 

• Mix flour, sugars, and cinnamon; cut in cold butter until crumbly. Refrigerate.
• Whisk flour, baking powder, and salt. In a separate bowl, cream butter and sugar until fluffy.
• Add eggs, vanilla, and sour cream to butter mixture. Fold in dry ingredients.
• Toss blueberries with 1 tablespoon flour and fold into batter. Spread in greased 9x9 pan.
• Top with streusel. Bake at 350°F for 40-50 minutes. Cool before slicing.

Notes

Toss blueberries in a little flour before adding to the batter to prevent them from sinking. Use full-fat sour cream for the best texture.

Nutrition

Serving: 120g | Calories: 380kcal (19%) | Carbohydrates: 52g (17%) | Protein: 4g (8%) | Fat: 18g (28%) | Saturated Fat: 10g (63%) | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Cholesterol: 75mg (25%) | Sodium: 210mg (9%) | Potassium: 120mg (3%) | Fiber: 2g (8%) | Sugar: 32g (36%) | Vitamin A: 500IU (10%) | Vitamin C: 3mg (4%) | Calcium: 60mg (6%) | Iron: 1mg (6%)