Blueberry Muffin Crumb Cake

This Blueberry Muffin Crumb Cake is soft, buttery, and topped with a cinnamon streusel you’ll want to eat with a spoon. Bake it this weekend.

Blueberry Muffin Crumb Cake is a soft vanilla cake studded with blueberries and finished with a buttery cinnamon streusel topping. This recipe serves 9, delivers a tender, muffin-like crumb under a crunchy, sugary top layer, and is perfect for a weekend breakfast or an easy brunch spread. Here’s everything you need to make it perfectly.

I’ve made this Blueberry Muffin Crumb Cake enough times to know the crumb topping is non-negotiable, don’t skip it or skimp on it. The first time I made this, I underbaked it by five minutes because my oven runs cool, and the middle stayed gummy. Now I always check with a skewer instead of trusting the timer alone.

Why You’ll Love This Blueberry Muffin Crumb Cake

The cake underneath is soft and tender, almost like an oversized muffin, while the streusel on top stays crunchy even after the cake cools. It comes together with ingredients you probably already have, and there’s no mixer required, just two bowls and a whisk. This is the kind of bake that works for a lazy Sunday or a last-minute brunch guest. And the blueberries stay juicy instead of sinking to the bottom, which is honestly the detail that sold me on this recipe in the first place.

What Ingredients Do You Need for Blueberry Muffin Crumb Cake?

Ingredient Group	Ingredient	Amount	Notes
For the Cake	All-purpose flour	1 ½ cups
For the Cake	Granulated sugar	¾ cup
For the Cake	Baking powder	2 teaspoons
For the Cake	Salt	¼ teaspoon
For the Cake	Large egg	1
For the Cake	Milk	½ cup
For the Cake	Unsalted butter, melted	¼ cup
For the Cake	Vanilla extract	1 teaspoon
For the Cake	Fresh or frozen blueberries	1 ½ cups
For the Crumb Topping	All-purpose flour	½ cup
For the Crumb Topping	Granulated sugar	¼ cup
For the Crumb Topping	Light brown sugar, packed	¼ cup
For the Crumb Topping	Ground cinnamon	¼ teaspoon
For the Crumb Topping	Unsalted butter, cold and cubed	4 tablespoons

Fresh or frozen blueberries both work here, so don’t stress if fresh ones aren’t in season. Cold, cubed butter is what makes the streusel actually crumbly instead of pasty, so pull it straight from the fridge right before you cut it into the flour and sugar mixture. This easy blueberry crumb cake leans on pantry staples, which is why it’s become my go-to homemade blueberry cake when I don’t feel like a grocery run.

How to Make Blueberry Muffin Crumb Cake Step by Step

1. Preheat your oven to 375°F (190°C). Grease and flour an 8×8 inch baking pan.

Prepare the Crumb Topping

2. In a medium bowl, combine ½ cup all-purpose flour, ¼ cup granulated sugar, ¼ cup packed light brown sugar, and ¼ teaspoon ground cinnamon. Cut in the cold, cubed butter with a pastry blender or your fingertips until the mixture resembles coarse crumbs. Set aside.

💡 Work quickly with the cold butter here, since warm butter turns the streusel greasy instead of crumbly.

Prepare the Cake Batter

3. In a large bowl, whisk together 1 ½ cups all-purpose flour, ¾ cup granulated sugar, 2 teaspoons baking powder, and ¼ teaspoon salt.
4. In a separate medium bowl, whisk together the egg, milk, melted butter, and vanilla extract.
5. Pour the wet ingredients into the dry ingredients and mix until just combined. Do not overmix; a few lumps are okay.

Pro Tip: Overmixing muffin-style batters develops the gluten too much and leads to a dense, tough cake instead of a tender one.

6. Gently fold in the blueberries.

💡 If using frozen blueberries, fold them in straight from the freezer instead of thawing, so they bleed less color into the batter.

7. Pour the batter into the prepared baking pan and spread evenly.
8. Sprinkle the reserved crumb topping generously over the top of the batter.
9. Bake for 35-40 minutes, or until a wooden skewer inserted into the center of the cake comes out clean. The top should be golden brown.

Pro Tip: A clean skewer from the center is the most reliable doneness test for crumb cake, more reliable than the timer alone.

10. Let the cake cool in the pan on a wire rack before serving.

Expert Tips for Perfect Blueberry Muffin Crumb Cake

Pro Tips for Success

The key to a crumbly streusel topping is keeping the butter cold right up until it hits the flour mixture. If it softens too much while you’re measuring everything else out, pop it back in the fridge for a few minutes before cutting it in.

For best results, fold the blueberries in gently with a spatula instead of stirring hard. Overworking the batter at this stage is what turns a soft, tender crumb into something dense and rubbery.

The most common mistake is pulling the cake out too early because the top looks golden — instead, always check the center with a skewer, since the crumb topping browns faster than the cake underneath finishes baking.

This blueberry breakfast cake works best when the blueberries are patted dry first if they’re fresh, since excess moisture can make the batter soggy in spots.

Listen for a faint crackling sound as the cake cools, that’s the streusel setting up into its crunchy final texture.

Delicious Variations

Quick Version: Use a store-bought crumb topping mix if you’re short on time, and you’ll cut the prep down by a few minutes without losing the streusel crunch.

Alternative Ingredients: Swap the blueberries for raspberries or diced peaches if that’s what’s in your fridge, using the same 1 ½ cups measurement.

Dairy-Free: Substitute the milk with your favorite plant-based milk and swap the butter for a dairy-free stick butter in both the cake and the streusel.

Troubleshooting Common Problems

Problem: The center of the cake is gummy or underbaked. Solution: Your oven likely runs cooler than the dial says. Tent the pan loosely with foil after 25 minutes if the top is browning too fast, and keep baking until a skewer comes out clean.

Problem: The crumb topping melted into the batter instead of staying separate. Solution: The butter in the streusel was too warm when it went into the oven. Chill the assembled cake for 10 minutes before baking next time.

Problem: The blueberries all sank to the bottom. Solution: Toss the blueberries in a spoonful of the dry cake flour mixture before folding them in, which helps suspend them through the batter.

How to Store and Reheat Blueberry Muffin Crumb Cake

Storage Method	Duration	Best Practice
Room Temperature	2 days	Cover tightly to keep the streusel from going stale
Refrigerator	5 days	Store in an airtight container
Freezer	3 months	Wrap individual squares tightly before freezing

Warm a slice in the microwave for about 15-20 seconds if you want that fresh-baked softness back, and you’ll know it’s ready when the streusel smells warm and buttery again. For a firmer, more toasted texture, a few minutes in a toaster oven works better than the microwave. Leftover squares also make a solid base for a quick trifle, just crumble them into a glass with yogurt and extra berries.

FAQs About Blueberry Muffin Crumb Cake

Bake This One This Weekend

Honestly, this Blueberry Muffin Crumb Cake is one of those recipes that disappears faster than you’d expect for something this simple. Seriously, the streusel alone is worth making it for. Save this to your baking board on Pinterest so it doesn’t get lost in your feed, and tell me in the comments what fruit swap you tried.

For more blueberry bakes worth trying, check out Blueberry Coffee Cake Muffins, Lemon Blueberry Sheet Cake, and Blueberry Oatmeal Breakfast Cake.

Blueberry Muffin Crumb Cake: soft vanilla cake studded with juicy blueberries under a buttery cinnamon streusel. Save this easy blueberry crumb cake for your next brunch!