Blueberry Crumb Cake Recipe with Lemon Glaze

This easy blueberry crumb cake has everything I want in a summer cake: a soft, tender crumb, plenty of juicy blueberries, a generous layer of buttery cinnamon streusel, and a bright lemon glaze drizzled over the top.

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If you love baking with fresh seasonal berries, you’ll also love my strawberry shortcake cake, layered with juicy strawberries and fluffy whipped cream.

Fresh lemon zest and juice bring out the flavor of the blueberries without overpowering them, while almond flour gives the cake an especially tender texture. The thick batter helps hold the berries throughout the cake, so you get blueberries in nearly every bite.

Best of all, you don’t need a mixer. The crumb topping is mixed by hand, and the simple cake batter comes together in one bowl with a whisk and spatula.

Serve this blueberry crumb cake recipe for breakfast or brunch with coffee, as an afternoon snack, or as a simple summer dessert. As a private chef, I love recipes like this that look beautiful on a brunch table but can also be made ahead and served at room temperature.

Quick Summary: This blueberry crumb cake combines a tender lemon-scented blueberry cake with a buttery brown sugar cinnamon streusel and fresh lemon glaze. It is baked in a 9-inch square pan at 350°F for about 35 minutes and requires no electric mixer.

Why You’ll Love This Blueberry Crumb Cake

There is a lot happening in one simple cake.

Tender, moist crumb: Almond flour and oil help create a soft cake that stays tender even after it cools.

Plenty of blueberries: Blueberries are folded directly into the batter, with a few reserved for the top so the finished cake looks as good as it tastes.

Buttery crumb topping: Brown sugar, granulated sugar, cinnamon, and butter create those irresistible sweet, crisp streusel crumbs.

Fresh lemon flavor: Lemon zest is rubbed directly into the sugar to release its fragrant oils, while fresh lemon juice flavors both the cake and glaze.

No mixer needed: Everything can be made with mixing bowls, a whisk, and a spatula.

Perfect for brunch or dessert: Think of it as somewhere between a blueberry coffee cake and a classic blueberry streusel cake. It is just as welcome alongside morning coffee as it is served for dessert.

For another easy fruit-filled bake that’s perfect with coffee or tea, try my cranberry orange loaf cake.

What Is Blueberry Crumb Cake?

Blueberry crumb cake is a tender cake filled with blueberries and topped with a buttery flour-and-sugar streusel. Unlike a plain blueberry cake, the crumb topping creates a contrasting layer that bakes until golden and crisp.

Crumb cake and coffee cake are closely related. The biggest difference is usually the topping. Crumb cake typically has a more substantial layer of buttery crumbs, while coffee cake is a broader category of cakes intended to be served with coffee and may have a thinner streusel topping.

Despite the name, coffee cake does not necessarily contain coffee.

This recipe falls comfortably into both categories, so if you’re looking for a blueberry coffee cake with crumb topping, this recipe works beautifully for that too.

Ingredients You’ll Need

For the Cinnamon Crumb Topping

All-purpose flour: Gives the streusel its structure and helps form distinct buttery crumbs.

Brown sugar: Adds moisture, sweetness, and a subtle caramel flavor.

Granulated sugar: Helps the topping bake up crisp.

Butter: Binds the dry ingredients together and creates a rich, buttery crumb topping.

Kosher salt: Balances the sweetness and enhances the other flavors.

Cinnamon: Adds warmth that pairs especially well with blueberries and lemon.

For the Blueberry Cake

Lemon zest: Fresh lemon zest gives the cake bright citrus flavor without adding excess liquid.

Lemon adds a lovely brightness to this blueberry cake. If you enjoy citrus-flavored desserts, try my lemon coconut cake with fluffy cream cheese frosting.

Granulated sugar: Sweetens the cake and is rubbed with the zest to make fragrant lemon sugar.

Milk: Adds moisture and helps create a tender crumb.

Oil: Keeps this blueberry cake soft and moist, even once it has completely cooled.

Lemon juice: Adds a little acidity and fresh lemon flavor.

Vanilla extract: Rounds out the lemon and blueberry flavors.

Almond flour: Adds richness and contributes to the cake’s tender texture.

All-purpose flour: Provides the structure needed to support the blueberries and crumb topping.

Kosher salt: Balances the sweetness.

Baking powder and baking soda: Provide lift so the cake stays tender rather than becoming heavy beneath the berries and streusel.

Blueberries: The star of the cake. Most are folded into the batter and a handful are scattered over the crumb topping before baking.

For the Lemon Glaze

Confectioners’ sugar: Creates a smooth, sweet glaze.

Lemon juice: Thins the confectioners’ sugar while adding a fresh tartness that balances the sweet crumb topping.

Why Use Almond Flour in Blueberry Cake?

Almond flour adds richness and tenderness to this blueberry crumb cake. Because it does not develop gluten like wheat flour, combining a portion of almond flour with all-purpose flour helps give the cake a softer crumb while the all-purpose flour provides the structure it needs.

Whisk the almond flour into the wet ingredients before adding the all-purpose flour. Almond flour can sometimes form small lumps, and adding it first makes it much easier to whisk those out without overmixing the finished batter.

Pro Tip: Once the all-purpose flour goes in, switch from vigorous whisking to gentle stirring. Overmixing wheat flour develops more gluten and can turn a tender crumb cake dense or tough.

How to Make Blueberry Crumb Cake

1. Prepare the Pan

Preheat the oven to 350°F.

Grease a 9-inch square cake or brownie pan and line it with parchment paper. Leave enough parchment extending over the sides to use as handles later.

This makes it much easier to remove the finished crumb cake without disturbing that beautiful streusel topping.

2. Make the Crumb Topping

Combine the all-purpose flour, brown sugar, granulated sugar, butter, kosher salt, and cinnamon in a bowl.

Use clean hands to work everything together until the mixture resembles damp sand and holds together when squeezed.

You want a combination of smaller crumbs and larger clusters rather than a completely uniform sandy mixture.

Squeeze some of the streusel between your fingers to create larger clumps, then gently break those apart over the cake. Different-sized crumbs create a much better texture than a uniformly fine topping.

Set the topping aside while you prepare the cake batter.

3. Make Lemon Sugar

Add the lemon zest and granulated sugar to a mixing bowl.

Rub the zest into the sugar with clean fingertips until the sugar feels slightly damp and smells intensely lemony.

This simple step releases the aromatic oils in the lemon peel and distributes them throughout the cake.

4. Add the Wet Ingredients

Add the milk, oil, lemon juice, and vanilla extract to the lemon sugar.

Whisk until thoroughly combined.

5. Add the Almond Flour

Whisk the almond flour into the wet mixture first.

Take a moment to break up any almond flour lumps now. Once the wheat flour is added, you want to mix the batter as little as possible.

6. Add the Remaining Dry Ingredients

Add the all-purpose flour, kosher salt, baking powder, and baking soda.

Stir just until the dry ingredients disappear.

The finished batter should be thick and sticky rather than thin or easily pourable. That is exactly what you want.

Batter consistency tip: Blueberry crumb cake batter should be thick enough to spread rather than pour. Don’t add extra milk to thin it. The thick consistency helps support the blueberries and the generous crumb topping as the cake bakes.

7. Fold in the Blueberries

Gently fold in the blueberries, reserving about 1/4 cup for the top.

Fold only until the berries are evenly distributed. Overmixing at this point can crush the berries and develop too much gluten in the batter.

8. Add the Streusel

Spread the thick cake batter evenly into the prepared pan.

Scatter the crumb topping evenly over the batter. Finish with the reserved blueberries, distributing them across the surface.

For bakery-style crumbs: pick up small handfuls of topping, gently squeeze them together, then break them into irregular pieces as you scatter them over the batter. Aim for everything from sandy little crumbs to larger clusters.

9. Bake

Bake at 350°F for about 35 minutes, until the crumb topping is golden brown and a cake tester inserted near the center comes out clean.

Try to insert the tester into the cake itself rather than directly through a blueberry. A burst berry can make a fully baked cake look wet on the tester.

Let the cake cool in the pan for 10 minutes.

Use the parchment paper to carefully lift the cake out of the pan and transfer it to a wire rack.

Allow it to cool completely before glazing.

10. Make the Lemon Glaze

Stir the confectioners’ sugar and fresh lemon juice together until smooth.

Drizzle the lemon glaze over the completely cooled blueberry crumb cake.

Let the glaze set briefly, then slice and serve.

Blueberry Crumb Cake Tips and Troubleshooting

How to Get the Best Crumb Topping

The best streusel topping should have a mixture of crisp little crumbs and larger buttery clusters.

The key is texture before the topping ever goes into the oven. When you squeeze the mixture in your hand, it should hold together. When you press or pull it apart, it should break into crumbs.

If you work the mixture until it is completely uniform, you lose those irregular pieces that give a crumb cake its characteristic top.

Also avoid packing the streusel firmly onto the batter. Scatter it loosely across the surface so heat can circulate around the crumbs and crisp their edges.

Fresh vs. Frozen Blueberries

Fresh blueberries are my first choice for this recipe because they are easy to fold into the thick batter without releasing much juice.

Frozen blueberries can also be used. Add them directly from the freezer rather than thawing them first. Thawed blueberries release considerably more juice and are more likely to streak the batter as you fold them in.

When using frozen berries, fold them in quickly and gently. Because frozen fruit cools the batter and adds moisture as it bakes, the cake may require a few additional minutes in the oven.

Do You Need to Toss Blueberries in Flour?

Not necessarily.

You’ll often see blueberry cake recipes tell you to toss berries with flour to keep them from sinking. In this recipe, the batter is intentionally thick and sticky, which helps suspend the blueberries without relying on an additional flour coating.

Gently folding the berries into the finished batter and reserving some for the top also helps distribute blueberries throughout the cake.

If you’re using frozen berries or particularly wet fresh berries, make sure there is no excess water clinging to them before folding them into the batter.

How to Tell When Blueberry Crumb Cake Is Done

Look for three things:

1. The crumb topping should be golden.
2. The center of the cake should look set rather than wet or jiggly.
3. A cake tester inserted into the cake near the center should come out clean or with a few moist crumbs, but no raw batter.

Remember that hitting a blueberry with your tester can leave it wet and purple even when the cake itself is fully baked. Test another spot before returning the cake to the oven.

Avoid baking simply until the entire cake feels dry. Blueberry cakes continue to set as they cool, and overbaking can turn an otherwise tender cake dry.

Why Is My Blueberry Crumb Cake Soggy in the Middle?

A wet center usually means the cake needs more baking time, but excess moisture from berries can also contribute.

Make sure washed blueberries are well drained and dry before adding them. If using frozen blueberries, add them frozen instead of thawing them. Most importantly, check the cake itself with a tester rather than judging doneness by juicy pockets immediately surrounding the berries.

If the crumb topping has browned before the center is finished, loosely cover the top with foil and continue baking until the center tests done.

Why Did My Crumb Topping Melt?

Crumb topping can melt into a cake when the ratio of butter to dry ingredients is too high or when the mixture does not have enough structure.

For this recipe, mix the streusel only until it resembles damp sand that can be squeezed into clumps. Don’t melt additional butter into the mixture simply because it looks crumbly. It is supposed to be crumbly.

Larger clusters will naturally spread somewhat in the oven, but they should still bake into a distinct layer over the cake.

Variations

This recipe is especially good as written with blueberry, lemon, and cinnamon, but there are a few simple ways to change it.

Mixed berry crumb cake: Replace some of the blueberries with raspberries or blackberries.

Extra lemon blueberry crumb cake: Add additional lemon zest for stronger citrus flavor rather than significantly increasing the lemon juice, which can alter the moisture and acidity of the batter.

No glaze: Leave off the lemon glaze and serve the cake with a simple dusting of confectioners’ sugar.

Warm spices: Add a small pinch of nutmeg or cardamom to the crumb topping along with the cinnamon.

Serving Suggestions

This lemon blueberry crumb cake is delicious at room temperature, which makes it especially useful for entertaining.

Serve it as part of a breakfast or brunch spread with coffee or tea, bring it to a summer gathering or picnic, or serve individual squares as a casual dessert.

If you love the combination of blueberries and lemon, try my blueberry lemon scones for another delicious homemade breakfast or brunch treat.

For dessert, you can pair slightly warm slices with softly whipped cream or vanilla ice cream. For brunch, I prefer it simply glazed and served as is.

The bright lemon glaze and blueberries also make this an especially lovely cake for spring and summer occasions.

For another rustic dessert that makes the most of seasonal fruit, try my strawberry rhubarb galette with its buttery, flaky crust and jammy fruit filling.

Make Ahead Instructions

Blueberry crumb cake is an excellent make-ahead bake.

For the freshest crumb topping, bake the cake the day you plan to serve it or the evening before. Let it cool completely before covering it.

If making it ahead, consider waiting to add the lemon glaze until the day you plan to serve it. This helps preserve the contrast between the crisp crumb topping and soft cake underneath.

How to Store Blueberry Crumb Cake

Once completely cooled, store the cake well covered at room temperature for up to 2 days.

For longer storage, refrigerate it in an airtight container. Bring refrigerated slices back to room temperature before serving for the best texture.

Because blueberries add moisture to the cake, the crumb topping will gradually soften during storage. This is normal and is why crumb cake is at its very best on the day it is baked.

Can You Freeze Blueberry Crumb Cake?

Yes. Blueberry crumb cake freezes well.

For the best texture, freeze the cake before adding the lemon glaze. Let the cake cool completely, then wrap individual pieces or the whole cake tightly and place in a freezer-safe container or bag.

Thaw at room temperature, then drizzle with freshly made lemon glaze before serving.

Frequently Asked Questions

More Blueberry and Summer Baking Recipes

If you love this blueberry crumb cake, try some of my other seasonal baking recipes next.

• Blueberry Lemon Scones
• Easy Strawberry Shortcake with Biscuits
• Strawberry Rhubarb Crumble
• Whole Foods Berry Chantilly Cake Recipe (Copycat)
• Stone Fruit Galette
• Strawberry Shortcake Cake Recipe (Giant Biscuit Shortcake)
• Olive Oil Honey Cake – Vegan Friendly

This blueberry crumb cake with lemon glaze is simple enough for an everyday bake but special enough to serve for brunch or dessert. Between the tender lemon-scented cake, juicy blueberries, buttery cinnamon crumbs, and tart-sweet glaze, every layer brings something to the table.

And because the entire recipe comes together without a mixer, it’s exactly the kind of cake I find myself returning to throughout blueberry season.

Looking for a special occasion cake featuring fresh berries? My berry chantilly cake has soft vanilla layers, fresh berries, and fluffy mascarpone cream frosting.