Why This Blueberry Coffee Cake with Extra Crunchy Crumble Works

I’ve made my share of coffee cakes over the years, and my biggest problem was always the crumble topping turning soft. The secret to that extra crunchy crumble is cold, cubed butter. When cold butter hits the oven’s heat, it creates little pockets of steam that keep the crumble light, crisp, and irresistible.

The type of sugar also matters. A mix of granulated sugar and brown sugar adds depth, sweetness, and a lightly caramelized crunch. The key is to avoid overmixing the crumble so it stays crumbly instead of heavy.

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Why You’ll Love This Blueberry Coffee Cake with Extra Crunchy Crumble

  1. It’s loaded with juicy blueberries in every bite.
  2. The extra crunchy crumble topping adds sweet, buttery texture.
  3. It’s easy enough for beginners.
  4. It tastes great warm or at room temperature.
  5. It’s perfect for brunch, dessert, or coffee time.
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What You’ll Need for Blueberry Coffee Cake with Extra Crunchy Crumble

Flour for Blueberry Coffee Cake

  • All-Purpose Flour: The main structure for the cake and crumble.
  • Cake Flour: Helps create a soft, tender crumb.

Sweetness and Structure for Blueberry Coffee Cake

  • Granulated Sugar: Adds sweetness to the cake and crumble.
  • Brown Sugar: Adds warm caramel flavor to the crumble.
  • Baking Powder: Helps the cake rise.
  • Eggs: Bind the batter and add richness.

Dairy Ingredients for Tender Blueberry Coffee Cake

  • Cold Butter: Essential for the extra crunchy crumble topping.
  • Sour Cream: Adds moisture, tenderness, and a light tang.

Blueberries and Flavor for Coffee Cake

  • Blueberries: Fresh or frozen both work. If using frozen, do not thaw them first.
  • Almond Extract: Adds a subtle bakery-style flavor. Vanilla extract also works.

How to Make Blueberry Coffee Cake

Prep and Mix the Batter

  1. Step 1: Preheat and Prep: Preheat your oven to 350°F (175°C). Grease and flour a 9-inch square baking pan.
  2. Step 2: Mix Dry Ingredients: In a large bowl, whisk together the all-purpose flour, cake flour, sugar, baking powder, and salt.
  3. Step 3: Mix Wet Ingredients: In a separate bowl, whisk together the eggs, sour cream, and almond extract.
  4. Step 4: Combine: Add the wet ingredients to the dry ingredients and mix until just combined. Gently fold in the blueberries.

Make the Extra Crunchy Crumble Topping

  1. Step 1: Combine Dry Ingredients: In a medium bowl, combine the flour, granulated sugar, brown sugar, and a pinch of salt.
  2. Step 2: Cut in the Butter: Add cold cubed butter and cut it into the flour mixture until it resembles coarse crumbs.
  3. Step 3: Add Crunch: Stir in sliced almonds for extra texture.

How to Make Blueberry Coffee Cake with Extra Crunchy Crumble

  1. Step 1: Assemble: Pour the batter into the prepared pan and spread it evenly. Sprinkle the crumble topping over the batter.
  2. Step 2: Bake: Bake for 45–55 minutes, or until a toothpick inserted into the center comes out clean.
  3. Step 3: Cool: Let the cake cool in the pan for 15–20 minutes before slicing.

ips for the Best Extra Crunchy Crumble Topping

  • Use cold butter, not melted butter.
  • Do not overmix the crumble topping.
  • Add sliced almonds, pecans, or walnuts for more crunch.
  • Chill the crumble for 15 minutes before baking if your kitchen is warm.
  • Tent the cake with foil if the crumble browns too quickly.

How to Serve Blueberry Coffee Cake

Serve this Blueberry Coffee Cake with Extra Crunchy Crumble warm or at room temperature. It’s delicious on its own, but you can also add whipped cream, vanilla ice cream, or a light dusting of powdered sugar.

It pairs perfectly with hot coffee, tea, or a cold glass of milk. For brunch, serve it with fresh fruit and yogurt.

How to Store and Reheat Blueberry Coffee Cake

  1. Fridge: Store leftover cake in an airtight container in the refrigerator for up to 3 days.
  2. Freezer: Freeze for up to 2 months. Wrap tightly in plastic wrap, then foil.
  3. Reheating: Reheat slices in the microwave for 20–30 seconds, or warm in a 350°F oven for 5–10 minutes.
Blueberry coffee cake with extra crunchy crumble article article article

Blueberry Coffee Cake with Extra Crunchy Crumble FAQ

Can I use frozen blueberries?

Yes. Use frozen blueberries straight from the freezer. Do not thaw them, or they may release too much moisture into the batter.

Can I make this cake gluten-free?

Yes. Use a gluten-free all-purpose baking flour that includes xanthan gum.

Why did my crumble topping burn?

Your oven may have been too hot, or the pan may have been too close to the heat source. Tent the cake with foil if the crumble browns too fast.

Can I add other fruits?

Yes. Raspberries, blackberries, or chopped strawberries also work well.

Can I reduce the sugar?

Yes, but do not reduce it too much because sugar helps keep the cake moist and tender.

Can I add lemon zest?

Absolutely. Lemon zest pairs beautifully with blueberries and adds a bright flavor.

Helpful References:

Related Recipes

 
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Blueberry coffee cake with extra crunchy crumble Recipe

  • Prep Time: 10
  • Cook Time: 30
  • Total Time: 40
  • Yield: 9 servings 1x
  • Category: Dessert
  • Method: Baking
  • Diet: Vegetarian
Blueberry coffee cake with extra crunchy crumble Recipe
Print Recipe

Description

Indulge in the delight of a classic Blueberry Coffee Cake with Extra Crunchy Crumble. This recipe features a moist and tender cake studded with juicy blueberries, complemented by a buttery, crisp crumble topping. Perfect for brunch, dessert, or a cozy afternoon treat, this cake is sure to become a family favorite. For a different flavor try these Baked Chicken Drumsticks

Ingredients

  • 1 1/2 cups all-purpose flour
  • 1/2 cup cake flour
  • 1 cup granulated sugar
  • 1/2 cup brown sugar, packed
  • 2 teaspoons baking powder
  • 1/2 teaspoon salt
  • 2 large eggs
  • 1 cup sour cream
  • 1 teaspoon almond extract
  • 6 tablespoons cold unsalted butter, cubed
  • 2 cups fresh or frozen blueberries (do not thaw if frozen)

Instructions

  1. Step 1: Preheat and Prep: Preheat your oven to 350°F (175°C). Grease and flour a 9-inch square baking pan.
  2. Step 2: Mix Dry Ingredients: In a large bowl, whisk together the all-purpose flour, cake flour, sugar, baking powder, and salt.
  3. Step 3: Mix Wet Ingredients: In a separate bowl, whisk together the eggs, sour cream, and almond extract.
  4. Step 4: Combine: Add the wet ingredients to the dry ingredients and mix until just combined. Gently fold in the blueberries.
  5. Step 5: Make the Crumble: In a medium bowl, combine the all-purpose flour, granulated sugar, brown sugar, and cold butter. Use a pastry blender or your fingers to cut the butter into the flour mixture until it resembles coarse crumbs.
  6. Step 6: Assemble: Pour the batter into the prepared baking pan. Sprinkle the crumble topping evenly over the batter.
  7. Step 7: Bake: Bake for 30 minutes or until a wooden skewer inserted into the center comes out clean and the crumble topping is golden brown.
  8. Step 8: Cool: Let the cake cool in the pan for at least 15 minutes before slicing and serving.

Notes

  • Substitution for Sour Cream: Plain Greek yogurt can be used as a substitute for sour cream.
  • Substitution for Almond Extract: Vanilla extract can be used as a substitute for almond extract. Use the same quantity.
  • Make-Ahead: The crumble topping can be made a day in advance and stored in the refrigerator.
  • Storage: Store the baked cake in an airtight container at room temperature for up to 3 days or in the refrigerator for up to 5 days.
  • Reheating: Reheat individual slices in the microwave for 20-30 seconds or in a preheated oven at 350°F (175°C) for 5-10 minutes.

Nutrition

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