Name: Lemon Blueberry Loaf Cake
Prep time: 10 min
Cook time: 60 min
Total time: 80 min
Yield: 12 servings
Cuisine: American
Ingredients: 1.5 cup all-purpose flour; 0.5 tsp salt; 1 tsp baking powder; 1 cup granulated sugar; 2 tbsp lemon zest; 0.75 cup buttermilk; 0.5 cup oil (vegetable, canola, or coconut oil); 2 large eggs (slightly beaten); 1 tbsp fresh lemon juice; 1 tsp vanilla extract; 1 cup blueberries (fresh or frozen); 1 cup powdered sugar; 2 tbsp fresh lemon juice

This easy lemon blueberry loaf cake is moist, tender, and topped with a sweet lemon glaze. Perfect for breakfast or dessert. Get the recipe!

How a Blueberry Phase Led to This Easy Lemon Blueberry Cake

My kids go through food phases faster than I can keep up. One week they can’t get enough blueberries, so I stock up. The next week they won’t touch them. That’s exactly what happened here. I had a fridge full of beautiful blueberries and no takers. So I did what any reasonable person would do: I turned them into a lemon blueberry loaf cake. This easy lemon blueberry cake is light, tender, and studded with juicy blueberries. The lemon glaze on top adds just the right amount of sweetness. It’s a win for everyone, especially me.

Three Reasons This Blueberry Loaf Cake Stands Out

The lemon zest rubbed into sugar gives a bright, intense lemon flavor without extra liquid.
Buttermilk keeps the crumb tender and moist, so the loaf stays soft for days.
The simple lemon glaze adds a tangy-sweet finish that complements the blueberries perfectly.

Key Ingredients for a Moist Lemon Blueberry Loaf

Buttermilk: Adds tenderness and moisture. If you don’t have it, make a quick substitute by adding 1 tablespoon lemon juice to 3/4 cup milk and letting it sit for 5 minutes.
Blueberries: Fresh or frozen both work. Toss them in a little flour before adding to the batter to help prevent sinking.
Lemon zest: Use a microplane or fine grater. Rub it into the sugar to release the oils for maximum lemon flavor.

Kitchen Tools You’ll Need for This Blueberry Loaf Cake

8 1/2 x 4 1/2 inch loaf pan
Mixing bowls (large and medium)
Whisk
Cooling rack
Microplane or zester for lemon zest
Knife for loosening the loaf

Tips for Baking the Best Lemon Blueberry Loaf Cake

Start by rubbing the lemon zest into the sugar with your fingers. This releases the oils and gives the cake a much stronger lemon flavor than just mixing them in. Don’t skip this step.

When you add the blueberries, fold them in gently. Overmixing can turn the batter purple and break the berries. A few strokes is all it takes. To keep blueberries from sinking, toss them in a tablespoon of flour before folding them in.

The cake bakes for 60 to 70 minutes. If the top starts browning too quickly, loosely cover it with aluminum foil and continue baking until a toothpick comes out clean. Let the loaf cool in the pan for 15 minutes, then run a knife around the edges before turning it out. Cooling completely on a wire rack is important before you add the glaze, otherwise it will melt right off.

Why Rubbing Lemon Zest with Sugar Makes a Difference

Rubbing lemon zest into sugar is a simple trick that makes a big difference. The sugar crystals act as an abrasive, breaking down the zest and releasing the essential oils. This gives the entire cake a more pronounced lemon flavor than if you just stirred the zest in. It’s worth the extra 30 seconds.

Easy Lemon Blueberry Cake Variations to Try

If you don’t have fresh blueberries, frozen ones work well. Just stir them in straight from the freezer, and be extra gentle to avoid turning the batter purple. You can also swap half the blueberries for raspberries or blackberries for a mixed berry loaf.

For a gluten-free version, use a 1-to-1 gluten-free flour blend. The texture will be slightly different but still delicious. Add a tablespoon of poppy seeds along with the dry ingredients for a lemon poppy seed twist.

When to Serve This Lemon Blueberry Loaf Cake

This lemon blueberry loaf cake is versatile. Enjoy a slice for dessert with a spoonful of whipped cream or a scoop of vanilla ice cream. It also makes a great afternoon snack alongside a cup of coffee or tea. And if you want to call it breakfast, I won’t tell.

How to Store Leftover Lemon Blueberry Loaf Cake

Store leftover lemon blueberry loaf cake in an airtight container at room temperature for up to 3 days. If your kitchen is warm, refrigerate it to keep the glaze from getting sticky. The cake will stay moist for several days.

Can You Freeze Lemon Blueberry Bread? Yes, Here’s How

To freeze, wrap the cooled loaf or individual slices tightly in plastic wrap, then foil. Freeze for up to 3 months. Thaw at room temperature, still wrapped, for a few hours. The glaze may soften but the cake will taste fresh.

Best Way to Reheat Lemon Blueberry Loaf Cake

For a warm slice, microwave individual pieces for 15 to 20 seconds. If you prefer a crisper edge, reheat slices in a 300°F oven for 5 to 10 minutes. The glaze will melt slightly, so you can add a fresh drizzle if you like.

Lemon Blueberry Loaf Cake FAQs

Can I use frozen blueberries in this recipe?

Yes, frozen blueberries work well. Stir them in straight from the freezer and be gentle to avoid turning the batter purple. You may need to add a couple extra minutes to the bake time.

What can I use instead of buttermilk?

If you don’t have buttermilk, make a quick substitute: add 1 tablespoon of lemon juice to 3/4 cup of milk and let it sit for 5 minutes. It will thicken slightly and work just as well.

Why did my loaf cake sink in the middle?

A sunken middle usually means the cake was underbaked or the batter had too much liquid. Make sure your oven is at 350°F and bake until a toothpick inserted in the center comes out clean, which can take up to 70 minutes.

Can I make this lemon blueberry loaf dairy-free?

Yes. Use a non-dairy milk like almond or oat milk with lemon juice to make a buttermilk substitute. The oil in the recipe is already dairy-free, so the rest of the ingredients are fine.