Gluten-Free Blueberry Crumb Cake

Let’s be real for a minute. Is there anything better than the smell of a warm, berry-filled cake filling your kitchen? This Gluten-Free Blueberry Crumb Cake is my love letter to simple, joyful baking. It’s moist, bursting with juicy blueberries, and topped with a buttery, crunchy crumb that might just be the best part. Whether you’re hosting a weekend brunch or just need a little something sweet with your afternoon coffee, this cake is your answer. It’s the kind of recipe that makes everyone feel welcome, no matter their diet, and I promise, you won’t miss the gluten one bit.

Table of Contents

Table of Contents

Why You’ll Love This Gluten-Free Blueberry Crumb Cake

I created this recipe for those days when you want a homemade treat without the fuss. It’s the happy middle ground between a muffin and a coffee cake.

• Incredibly Easy: No fancy techniques or tools required. It comes together in one bowl (mostly!).
• Perfect Texture: Thanks to a blend of gluten-free flours, the cake is tender and never gritty.
• Family-Friendly: My kids go crazy for the sweet crumb topping. It’s a sneaky way to get them excited about baking with fruit.
• Make-Ahead Magic: Tastes even better the next day, so you can bake it ahead for stress-free entertaining.

Gather Your Ingredients

You likely have most of these in your pantry already! Using a trusted gluten-free flour blend is key for the best results.

For the Cake:

• 2 cups (280g) gluten-free 1:1 baking flour blend (like Bob’s Red Mill or King Arthur)
• 3/4 cup (150g) granulated sugar
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup (240ml) buttermilk, at room temperature
• 2 large eggs, at room temperature
• 1/3 cup (75g) unsalted butter, melted and cooled
• 1 teaspoon vanilla extract
• 1 1/2 cups (210g) fresh or frozen blueberries (if frozen, do not thaw)

For the Crumb Topping:

• 1/2 cup (70g) gluten-free 1:1 baking flour
• 1/3 cup (65g) packed light brown sugar
• 1/4 cup (50g) granulated sugar
• 1/4 teaspoon ground cinnamon
• 1/4 cup (55g) unsalted butter, melted

For the Glaze (Optional):

• 1/2 cup (60g) powdered sugar
• 1-2 tablespoons milk or lemon juice

How To Make Gluten-Free Blueberry Crumb Cake

Follow these simple steps for a perfect cake every time. Remember, don’t overmix the batter – a few lumps are totally fine!

1. Prep and Preheat. Position a rack in the center of your oven and preheat it to 350°F (175°C). Grease an 8-inch or 9-inch square baking pan and line it with parchment paper, leaving an overhang for easy removal.
2. Make the Crumb Topping. In a small bowl, whisk together the 1/2 cup flour, brown sugar, granulated sugar, and cinnamon. Pour in the melted butter and stir with a fork until the mixture forms clumps and resembles wet sand. Set aside.
3. Mix the Dry Ingredients. In a large mixing bowl, whisk the 2 cups of gluten-free flour, sugar, baking powder, baking soda, and salt.
4. Combine the Wet Ingredients. In a separate bowl or large measuring cup, whisk the buttermilk, eggs, melted butter, and vanilla extract until smooth.
5. Bring It All Together. Pour the wet ingredients into the dry ingredients. Gently stir with a spatula until just combined. The batter will be thick. Carefully fold in the blueberries, trying not to burst them.
6. Assemble and Bake. Spread the batter evenly into your prepared pan. Sprinkle the crumb topping over the batter, breaking up any very large clumps with your fingers. Bake for 45-55 minutes, or until a toothpick inserted into the center of the cake (not through a blueberry) comes out clean.
7. Cool and Glaze. Place the pan on a wire rack and let the cake cool completely. If using the glaze, whisk the powdered sugar and 1 tablespoon of liquid until smooth, adding more liquid a teaspoon at a time until it’s drizzle-able. Drizzle over the cooled cake before slicing.

Essential Tools You’ll Need

• 8-inch or 9-inch square baking pan
• Mixing bowls (one large, one small)
• Whisk and spatula
• Measuring cups and spoons
• Wire cooling rack

Tips, Tricks, and Variations for the Perfect Cake

This Gluten-Free Blueberry Crumb Cake is wonderfully forgiving. Here’s how to make it your own:

• Room Temperature is Key: Using room-temperature buttermilk and eggs helps the batter come together smoothly and creates a better rise.
• Don’t Overmix: Once you add the wet to the dry, mix until you no longer see dry flour. Overmixing can lead to a dense cake.
• Frozen Berry Hack: Using frozen blueberries? Toss them in a tablespoon of your gluten-free flour blend before folding them in. This helps prevent them from sinking to the bottom and bleeding too much.
• Make it Dairy-Free: Use your favorite plant-based milk mixed with 1 tablespoon of vinegar (let it sit 5 minutes) for the buttermilk, and swap the butter for a dairy-free alternative like Earth Balance.
• Feeling Adventurous? Try this same base with raspberries and a dash of lemon zest, or chopped peaches for a summer twist. It’s a fantastic gluten-free breakfast option too!

How to Serve and Store Your Masterpiece

This cake is a star all on its own. I love serving it slightly warm with a big cup of coffee or tea. It’s perfect for a relaxed weekend brunch alongside a simple fruit salad. For storing, once completely cool, cover it tightly with plastic wrap or transfer slices to an airtight container. It will stay fresh at room temperature for 2 days, or in the refrigerator for up to 5 days. You can also freeze the whole cake or individual slices for up to 3 months. Just thaw overnight in the fridge.

Can I use a different gluten-free flour?

Absolutely! I highly recommend a 1:1 baking blend that contains xanthan gum. Brands can behave differently, so results may vary slightly. I don’t recommend using a single flour like almond or coconut flour, as they won’t provide the right structure.

My crumb topping melted into the cake. What happened?

This usually means the butter in the topping was too warm or the crumb mixture was too wet. Make sure your melted butter has cooled a bit before mixing it in. The mixture should clump when pinched, not look like a paste. If it does seem too wet, you can add an extra tablespoon of flour.

Can I make this recipe dairy-free?

Yes, you can! For a dairy-free version, use a plant-based milk (like almond or oat) soured with vinegar for the buttermilk, and use a high-quality vegan butter substitute for both the cake and the topping.

How do I know when the cake is truly done?

The top will be golden brown, the crumbs will look set, and the edges will slightly pull away from the pan. The best test is the toothpick. Insert it into the center of the cake (avoiding a blueberry pocket) – it should come out with just a few moist crumbs, not wet batter. If you’re unsure, you can always check the internal temperature with an instant-read thermometer; it should read about 200°F (93°C). For more on perfect baking, this guide on testing for doneness is a great resource.

Can I use a different pan?

You can use a 9-inch round cake pan, but the baking time may be slightly less. Keep an eye on it after the 35-minute mark. A springform pan also works beautifully for easy removal.

And there you have it—your new go-to Gluten-Free Blueberry Crumb Cake. It’s proof that baking without gluten can be every bit as delicious and soul-satisfying. This cake has seen me through countless Sunday mornings, last-minute potlucks, and those “I need a treat” moments. I hope it brings as much warmth and joy to your kitchen as it does to mine. Now, go grab that mixing bowl and bake up something wonderful! If you loved this, you might also adore my classic Gluten-Free Banana Bread for another easy, beloved treat.

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