Extra Moist Lemon Blueberry Loaf Cake
This lemon blueberry loaf cake is tender, buttery, and studded with juicy berries in every slice. It’s a simple one-bowl cake that comes together without a mixer, and the lemon glaze sharpens all the sweetness.
I make it when I want something that feels a little special but doesn’t demand much from me. The crumb stays soft for days, and the bright citrus cuts through the richness so each bite tastes balanced.
Why This Blueberry Loaf Stays So Soft
The secret is the sour cream. It adds moisture without thinning the batter too much, so the loaf bakes up dense but tender, not dry and crumbly.
I also toss the berries in a spoonful of flour before folding them in. That keeps them suspended throughout the loaf, so you won’t end up with a berry pile at the bottom.
The lemon zest in the batter plus the tangy glaze makes sure the cake never tastes heavy. It’s bright and buttery all at once.
Ingredients
- 1½ cups (190g) all-purpose flour: spooned and leveled for accuracy; remove 1 tablespoon to toss with blueberries
- 1½ tsp baking powder: gives the loaf its lift
- ½ tsp fine sea salt: balances the sweetness
- ½ cup (113g) unsalted butter, softened: brings richness and tenderness
- ¾ cup (150g) granulated sugar: sweetens and helps browning
- 2 large eggs, at room temperature: for structure
- 1 tbsp lemon zest (from about 1 lemon): brightens the batter
- 1 tsp vanilla extract: rounds out the flavors
- ½ cup (120ml) sour cream, at room temperature: the key to a moist crumb
- ¼ cup (60ml) whole milk, at room temperature: adjusts the batter consistency
- 1½ cups (225g) fresh blueberries: rinse and dry well; frozen work too, see FAQ
- 1 cup (120g) powdered sugar, sifted: for the glaze
- 2 to 3 tbsp fresh lemon juice: thin the glaze to a thick but pourable consistency
Variations / Substitutions
- No lemon: Skip the zest and glaze, and use vanilla only.
- Berry swap: Raspberries or blackberries work just as well. Toss them in flour the same way.
- Sour cream substitute: Full-fat Greek yogurt yields a similar tang and moisture.
Moist Lemon Blueberry Loaf makes a lovely treat to go with this cake.
How to Make Lemon Blueberry Loaf Cake
Step 1: Whisk the Dry Ingredients
Preheat the oven to 350°F (175°C). Grease an 8½ x 4½-inch loaf pan and line it with parchment paper, leaving an overhang on the long sides. In a medium bowl, whisk together the 1½ cups flour (reserving that 1 tablespoon for the berries), the baking powder, and the salt.
This step makes sure the leavening is evenly distributed, so you won’t bite into a bitter pocket. Set the bowl aside.
Step 2: Cream the Butter and Sugar
In a large bowl, beat the softened butter and sugar with a hand mixer or stand mixer for about 3 minutes, until pale and fluffy. Scrape down the bowl, then beat in the eggs one at a time, mixing well after each addition. Add the lemon zest and vanilla.
The mixture will look smooth and noticeably lighter. That airy base is what helps the loaf rise without being heavy.
Step 3: Fold in the Dry Mix and Blueberries
With a spatula, gently stir in about a third of the flour mixture, then half of the milk. Alternate, starting and ending with flour, mixing just until the batter comes together. In a small bowl, toss the blueberries with the reserved tablespoon of flour, then fold them into the batter with a few light strokes.
You’ll see a few streaks of flour at first, but they disappear quickly. Stop as soon as no dry patches remain — overworking here makes the loaf tough.
Step 4: Bake the Loaf
Scrape the batter into the prepared pan and smooth the top. Bake for 55 to 65 minutes, until the top is deep golden and a toothpick inserted in the center comes out with a few moist crumbs (no wet batter). Start checking at 50 minutes.
The loaf will dome slightly and pull away from the sides. Let it cool in the pan on a wire rack for 10 minutes, then lift it out with the parchment and let it cool completely before glazing.
Step 5: Drizzle with Lemon Glaze
Once the cake is fully cool, whisk the powdered sugar with 2 tablespoons of lemon juice. Add more juice, a teaspoon at a time, until the glaze is thick but flows slowly off the whisk. Drizzle it all over the top, letting it drip down the sides.
Slice thick and serve. The crumb will be tight and yellow, dotted with blue bursts of berry, and the glaze will still be slightly tacky.
A Few Tips for the Best Blueberry Loaf
- Start checking for doneness 5 minutes before the suggested bake time. Every oven runs differently, and overbaking dries out the crumb quickly.
- Use a light-colored metal loaf pan for even browning. Dark pans can overbake the edges before the center sets.
- For an even stronger lemon flavor, rub the lemon zest into the granulated sugar with your fingertips before adding the butter. It releases the oils and perfumes the whole cake.
Storing Your Blueberry Loaf
- Room Temperature: Keep the loaf tightly wrapped or under a cake dome for up to 3 days. The glaze may soften, but the flavor remains bright.
- Refrigerator: Store wrapped in the fridge for up to 5 days. Bring slices to room temperature before serving for the best texture.
Frequently Asked Questions
Can I use frozen blueberries?
Yes, and you don’t need to thaw them first. Toss the still-frozen berries in the flour called for in the recipe to prevent them from bleeding into the batter.
My lemon glaze was too runny. What went wrong?
Likely too much lemon juice. Stir in more powdered sugar, a tablespoon at a time, until the glaze reaches a thick but pourable consistency.
Can I freeze the loaf?
Absolutely. Wrap the unglazed, completely cooled loaf tightly in plastic wrap and foil, then freeze for up to 2 months. Thaw overnight at room temperature and glaze fresh.
Lemon Blueberry Loaf Cake Recipe
Ingredients
Method
- Preheat the oven to 350°F. Grease and line an 8½ x 4½-inch loaf pan. Whisk the flour (minus the reserved tablespoon), baking powder, and salt in a bowl.
- Beat the butter and sugar for 3 minutes until fluffy. Add eggs one at a time, then the lemon zest and vanilla.
- Alternately fold in the flour mixture and milk, starting and ending with flour. Toss blueberries with the reserved flour, then gently fold them in.
- Pour batter into the pan and bake 55 to 65 minutes, until a toothpick comes out with only moist crumbs. Cool in the pan 10 minutes, then lift out and cool completely.
- Whisk the powdered sugar with lemon juice until thick but pourable. Drizzle over the cooled loaf, slice, and serve.
Notes
