Are you ready to bake a delicious Lemon Blueberry Crumb Cake? This simple recipe blends tangy lemon with sweet blueberries, creating a treat that’s perfect for any occasion. With easy steps and helpful tips, I’ll guide you through each part of the process. Whether you're a baking pro or just starting, you can create a delightful cake that everyone will love. Let’s get started on this baking adventure!
Why I Love This Recipe
- Bright Flavor: The combination of lemon and blueberries creates a refreshing and vibrant taste that is perfect for any occasion.
- Easy to Make: This crumb cake comes together quickly, making it a great option for both novice and experienced bakers.
- Perfect Texture: The crumb topping adds a delightful crunch, while the cake itself remains moist and tender.
- Versatile Delight: Whether served for breakfast, brunch, or dessert, this cake is always a crowd-pleaser.
Ingredients
List of Ingredients with Measurements
To make this delightful lemon blueberry crumb cake, gather the following ingredients:
- 1 ½ cups all-purpose flour
- 1 cup granulated sugar
- ½ cup unsalted butter, softened to room temperature
- 2 large eggs, at room temperature
- 1 teaspoon pure vanilla extract
- ½ cup buttermilk, at room temperature
- Zest of 1 large lemon
- 2 tablespoons fresh lemon juice
- 2 teaspoons baking powder
- ½ teaspoon baking soda
- ¼ teaspoon salt
- 1 cup fresh blueberries (or frozen, thoroughly thawed and drained)
- ½ cup brown sugar, packed
- ½ cup rolled oats
- ½ teaspoon ground cinnamon
Ingredient Substitutions
You can make this cake even if you don't have all the exact ingredients. Here are some easy swaps:
- All-Purpose Flour: You can use whole wheat flour for a heartier cake.
- Granulated Sugar: Coconut sugar works well as a substitute.
- Unsalted Butter: Use coconut oil for a dairy-free option.
- Buttermilk: Mix ½ cup milk with 1 tablespoon vinegar or lemon juice to create a buttermilk substitute.
- Fresh Blueberries: If you cannot find fresh blueberries, try using frozen ones. Just make sure to thaw and drain them well.
Tips for Selecting Fresh Blueberries
When picking blueberries, follow these tips for the best results:
- Color: Look for deep blue berries. Avoid any with green or red spots.
- Firmness: Choose plump berries that feel firm. Soft ones may be overripe.
- Mold: Check for signs of mold. Moldy berries can spoil the whole batch.
- Smell: Fresh blueberries should have a sweet, fruity scent. If they smell sour, skip them.
By selecting the best ingredients, you set the stage for a delicious lemon blueberry crumb cake!

Step-by-Step Instructions
Prepping the Oven and Baking Pan
Start by preheating your oven to 350°F (175°C). This ensures even baking. Next, take a 9-inch square baking pan. Grease it with butter or cooking spray. Lightly dust the pan with flour. This helps prevent sticking.
Mixing the Batter
In a large bowl, add the softened butter and granulated sugar. Use an electric mixer to cream them. Mix until light and fluffy, which takes about 3-5 minutes. Next, add the eggs one at a time. Make sure to mix well after each egg. Then, add the vanilla extract, lemon zest, and fresh lemon juice. Blend until smooth.
In another bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt. Gradually add this mixture to your wet ingredients. Mix on low speed and alternate with the buttermilk. Begin and end with the dry mix. Be careful not to over-mix; this keeps the cake tender. Finally, fold in the fresh blueberries gently.
Making the Crumb Topping
For the crumb topping, mix brown sugar, rolled oats, and ground cinnamon in a small bowl. Add a pinch of flour, about 2 tablespoons. Use your fingers or a fork to mix in the remaining softened butter. Keep mixing until it looks like coarse crumbs.
Baking the Cake
Pour the cake batter into the prepared baking pan. Spread it evenly to the corners. Sprinkle the crumb topping generously over the batter. Place the pan in the oven and bake for 45-50 minutes. Check if it’s done by inserting a toothpick in the center. It should come out clean or with a few moist crumbs. Once baked, let the cake cool for 10 minutes in the pan. Then, transfer it to a wire rack to cool completely before slicing.
Tips & Tricks
Common Mistakes to Avoid
When making Lemon Blueberry Crumb Cake, avoid over-mixing the batter. This can make the cake dense. Mix until just combined for a light texture. Another mistake is using cold eggs or buttermilk. Room temperature ingredients mix better, leading to a fluffier cake. Lastly, don't skip the crumb topping. It adds a sweet crunch that balances the tartness of the lemon and blueberries.
How to Achieve a Lighter Cake Texture
To ensure a light cake, cream your butter and sugar well. This step adds air to the batter. Use room temperature eggs, as they blend smoothly and help with rise. Also, measure your flour correctly. Too much flour can weigh down your cake. Spoon the flour into your measuring cup and level it off with a knife. Finally, don’t forget to fold in the blueberries gently. This keeps them intact and prevents a heavy mix.
Best Practices for Storing Leftovers
To store your leftover cake, wrap it tightly in plastic wrap or foil. This keeps it fresh and moist. You can also place it in an airtight container. Store it at room temperature for up to three days. For longer storage, freeze the cake. Cut it into squares, wrap each piece, and place them in a freezer bag. When you want to enjoy a slice, thaw it at room temperature and savor the flavor.
Pro Tips
- Use room temperature ingredients: Ensure your butter, eggs, and buttermilk are at room temperature for better incorporation, resulting in a lighter cake texture.
- Don’t over-mix the batter: Mix just until combined to maintain the cake's tenderness. Over-mixing can lead to a dense crumb.
- Fresh vs. frozen blueberries: If using frozen blueberries, make sure to thaw and drain them well to prevent excess moisture in your batter.
- Cool properly: Allow the cake to cool in the pan for at least 10 minutes before transferring it to a wire rack. This helps maintain its shape and prevents crumbling.
Variations
Gluten-Free Lemon Blueberry Crumb Cake
You can make a gluten-free version. Use a gluten-free flour blend instead of all-purpose flour. This switch keeps the cake light and moist. Look for a brand that has xanthan gum for better texture. Follow the same steps in the recipe. The flavor stays bright and fresh.
Adding Different Fruits or Flavors
Feel free to experiment with other fruits. Raspberries and strawberries work well in this cake. You can even mix in some chopped peaches for a summer twist. For added flavor, try using orange zest instead of lemon. This gives a nice change while keeping the cake sweet.
Vegan Option for the Cake
To make a vegan version, replace eggs with flax eggs. Mix 1 tablespoon of flaxseed meal with 3 tablespoons of water for each egg. Use plant-based butter or coconut oil instead of regular butter. Swap buttermilk for almond milk mixed with a bit of lemon juice. This keeps the cake moist and fluffy.
Storage Info
How to Store Lemon Blueberry Crumb Cake
To keep your Lemon Blueberry Crumb Cake fresh, store it in an airtight container. You can place it on the counter for up to three days. If the weather is warm, put it in the fridge. The cool air will help keep it moist. Just remember to cover it well to avoid drying out.
Freezing Tips for Long-Term Storage
If you want to save some cake for later, freezing is a great option. First, let the cake cool completely. Then, slice it into squares. Wrap each piece tightly in plastic wrap. After that, place all the wrapped pieces in a freezer-safe bag. This way, the cake stays fresh for up to three months. When you want a slice, just take it out and let it thaw in the fridge.
Reheating Instructions for Leftovers
When you're ready to enjoy leftover cake, reheating makes it taste fresh again. Preheat your oven to 350°F (175°C). Place the cake on a baking sheet and cover it with foil. Heat for about 10-15 minutes. This method warms it gently without drying it out. You can also microwave a slice for about 15-20 seconds. Enjoy your cake warm for the best taste!
FAQs
Can I use frozen blueberries for this recipe?
Yes, you can use frozen blueberries. Just make sure to thaw and drain them first. This helps keep the batter from getting too watery. Frozen berries can still add great flavor and color to your cake.
How do I know when the cake is fully baked?
To check if the cake is done, insert a toothpick into the center. If it comes out clean or with a few moist crumbs, the cake is ready. Baking usually takes 45 to 50 minutes, so keep an eye on it.
What can I serve with Lemon Blueberry Crumb Cake?
This cake pairs well with a scoop of vanilla ice cream or a dollop of whipped cream. You can also serve it with a cup of tea or coffee. Fresh fruit on the side adds a nice touch, too!
In this blog post, we explored how to make a delicious lemon blueberry crumb cake. We covered key ingredients, simple steps, and helpful tips to ensure success. Remember to select fresh blueberries for the best flavor, avoid common mistakes, and store your cake properly. You can even try variations like gluten-free or vegan options. I hope you feel inspired to bake this delightful treat. Making this cake will give you joy and impress those you share it with. Happy baking!