Name: Bakery-Style Blackberry Coffee Cake with Brown Butter Streusel
Prep time: 25 min
Cook time: 40 min
Total time: 1 h 5 min
Yield: 9 slices
Cuisine: American

Bakery-Style Blackberry Coffee Cake with Brown Butter Streusel

Bakery-Style Blackberry Coffee Cake with Brown Butter Streusel cover

From the Cook

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Bakery-Style Blackberry Coffee Cake with Brown Butter Streusel

Browndis

Ingredients

Warning0 allergens identified

Instructions

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Prepare the Blackberry Layer

In a saucepan, combine blackberries, sugar, and lemon juice. Cook over medium heat until berries soften and release their juices.

In a small bowl, whisk cornstarch with water, then stir into the pan. Cook 1 to 2 minutes until thick and jammy.

When you drag a spoon through the mixture, it should leave a clear streak that slowly fills back in.

Set aside to cool (or refrigerate).

Brown the Butter

In a light-colored saucepan, melt butter over medium heat. Cook until foamy, golden, and nutty, about 5 to 7 minutes.

Pour into a heatproof bowl and cool until warm but not hot.

Make the Streusel

In a bowl, mix brown sugar, granulated sugar, flour, salt, and lemon zest.

Add the portion of browned butter and vanilla. Mix until crumbly.

Use your hands to form both large and small clumps.

Refrigerate while preparing the batter.

Make the Cake Batter

Preheat oven to 350°F (175°C). Line a 9-inch round pan with parchment.

Whisk browned butter with granulated and brown sugar.

Add eggs, yolk, vanilla, sour cream, and milk. Whisk until smooth.

In a separate bowl, whisk flour, baking powder, baking soda, and salt.

Fold dry ingredients into wet until just combined. Do not overmix.

Assemble

Spread about 3/4 of the batter evenly in the pan.

Spoon blackberry filling over top and gently swirl.

Carefully spread remaining batter over the jam. Some mixing is fine.

Sprinkle streusel evenly over the top.

Bake

Bake 40 to 45 minutes, until a toothpick inserted in the center comes out with a few moist crumbs.

Cool in the pan for 30 minutes, then transfer to a wire rack to cool completely.

Dust with powdered sugar before serving.

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Tips & Tricks (5)

Brown Your Butter Properly 🧈
Cook butter over medium heat for 8-12 minutes until it turns golden amber and smells nutty, then cool completely before mixing into streusel to prevent melting the other ingredients and ensure a crumbly texture.
Toss Berries in Cornstarch 🫐
Coat blackberries lightly with cornstarch before folding into batter to absorb excess moisture and prevent them from sinking to the bottom or bleeding too much into the crumb.
Use Cold Sour Cream and Eggs 🥶
Keep sour cream and eggs cold until mixing to create a more tender, plush crumb structure—warm ingredients can cause over-mixing and develop gluten, resulting in a dense cake.
Don't Skip the Lemon Zest 🍋
Add lemon zest directly into the dry flour mixture before wet ingredients to distribute the bright, floral notes evenly throughout the cake and enhance the blackberry flavor.
Underbake Slightly for Moisture 🕐
Remove the cake when a toothpick inserted in the crumb comes out with a few moist crumbs (not completely clean) for that signature bakery-style plush texture that stays tender for days.