Moist Lemon Blueberry Loaf with Lemon Glaze

A buttery lemon loaf jammed with juicy blueberries and finished with a sharp, crackly glaze. It feels special enough for a weekend brunch but comes together on a busy weekday without a mixer. The sour cream in the batter keeps it soft for days, and the lemon hits in three places so it never tastes flat.

A loaf like this asks for thick slices and not much else. Maybe coffee, maybe a quiet afternoon.

Why This Loaf Works So Well

The crumb is tight and tender, with a fine grain that supports the berries without letting them sink. You taste the butter first, then a bright lemon hit, followed by little jammy pockets from the blueberries.

I keep coming back to this one because it stays moist on the counter longer than most quick breads. The sour cream does the heavy lifting, and the glaze seals the top so nothing dries out overnight.

Ingredients

• 1 ½ cups all-purpose flour: spooned and leveled, not scooped
• 1 tsp baking powder
• ¼ tsp baking soda
• ½ tsp fine sea salt
• ½ cup unsalted butter, softened: let it sit out for 30 minutes to soften
• 1 cup granulated sugar
• 2 large eggs: room temperature, they blend more smoothly
• 2 tbsp lemon zest: from about 2 large lemons
• ¼ cup fresh lemon juice: plus more for the glaze
• ½ cup full-fat sour cream: Greek yogurt works in a pinch
• 1 tsp vanilla extract
• 1 ½ cups fresh or frozen blueberries: if frozen, do not thaw
• 1 cup powdered sugar: for the glaze
• 2 to 3 tbsp lemon juice: for the glaze, adjust to your preferred consistency

Variations / Substitutions

• Blueberries: Swap in raspberries, chopped blackberries, or a mix. Cut any larger berries in half so they distribute evenly.
• Sour cream: Full-fat Greek yogurt gives a similar tang and tenderness, but the loaf may be a touch less rich.
• Dairy-free: Use a good plant-based butter stick and a thick unsweetened coconut yogurt.
• Gluten-free: A 1:1 all-purpose gluten-free flour blend works here without any other changes.
• Extra lemon: Add a teaspoon of lemon extract to the batter if you want the flavor to jump out even more.

If you enjoy this loaf, try a Lemon Poppy Seed Loaf next.

How to Make Lemon Blueberry Loaf

Step 1: Whisk the Dry Ingredients

In a medium bowl, whisk together the 1 ½ cups flour, 1 teaspoon baking powder, ¼ teaspoon baking soda, and ½ teaspoon salt until there are no lumps. Set the bowl aside.

The mixture will look pale and fluffy from the aeration, and you should see no streaks of baking soda or powder. This small step distributes the leavening so you avoid tunnels in the loaf later.

Step 2: Cream the Butter and Sugar

In a large bowl, beat the softened ½ cup butter and 1 cup sugar with a sturdy spatula or a hand mixer on medium speed until the mixture lightens in color and looks fluffy, about 2 minutes. You are not creaming for volume here, just combining the fat and sugar until it resembles wet sand.

When you pull the spatula through, the mix should hold a soft ribbon. Add the 2 eggs one at a time, beating well after each addition until the batter is smooth and pale yellow.

Step 3: Mix in the Lemon and Sour Cream

Add the 2 tablespoons lemon zest, ¼ cup lemon juice, and 1 teaspoon vanilla to the butter mixture and stir slowly until everything is just combined. The batter may look slightly curdled from the acid, and that is completely normal.

Now stir in the ½ cup sour cream. Switch to a spatula and fold in the dry ingredients in two additions, mixing only until you see the last streak of flour disappear. Overworking the batter right now will make the loaf tough.

Step 4: Fold in the Blueberries and Bake

Heat the oven to 350°F (177°C). Grease a 9×5-inch loaf pan and line it with a strip of parchment paper, leaving a couple inches of overhang on the longs sides for easy lifting. Toss the 1 ½ cups blueberries with a teaspoon of flour in a small bowl (this helps them stay suspended). Gently fold the blueberries into the batter with just a few strokes, then scrape everything into the prepared pan and smooth the top.

The batter will be thick and dotted with berries. Bake on the center rack for 50 to 55 minutes, until a toothpick inserted in the center comes out with a few moist crumbs but no wet batter. If the top browns too quickly, tent it loosely with foil after 40 minutes.

Step 5: Glaze and Slice the Loaf

Let the loaf cool in the pan for 10 minutes, then use the parchment to lift it onto a wire rack. Cool completely before you glaze, or the heat will melt the icing into a puddle. In a small bowl, whisk 1 cup powdered sugar with 2 to 3 tablespoons of lemon juice until you get a thick but pourable consistency. Drizzle the glaze over the top, letting it drip down the sides. Wait a few minutes for the glaze to set, then slice thick and serve. The crackle of the glaze against a soft crumb is half the payoff.

Keeping Your Loaf Soft

• Toss the berries in flour: before folding, even if the recipe doesn’t remind you. It helps prevent them from dropping to the bottom during baking.
• Use room temperature eggs and butter. Cold ingredients don’t blend evenly and can leave you with a dense, rubbery loaf.
• Spoon your flour into the measuring cup and level it off: rather than dipping the cup straight into the bag. Too much flour will dry out the loaf.
• Don’t skip the cooling time before glazing. If the loaf is even slightly warm, the glaze will soak in instead of sitting on top.

Bake times by pan size and material:

Storing Leftovers

• Refrigerate: Wrap the cooled loaf tightly in plastic or keep it in an airtight container in the fridge for up to 5 days. The crumb stays softer if you bring slices to room temperature before eating.
• Freeze: You can freeze the whole unglazed loaf, wrapped well, for up to 3 months. Thaw overnight in the fridge, then add the glaze fresh before serving. Glazed slices also freeze well with wax paper between them.

What to Serve with Lemon Blueberry Loaf

A thick slice with a cup of strong black coffee or Earl Grey tea lets the citrus shine without fighting it. For a dessert angle, serve it warm with a scoop of vanilla bean ice cream so the cold cream melts into the warm crumb. A small bowl of lightly sweetened whipped cream and extra fresh berries also turns it into an easy shortcake moment.

Frequently Asked Questions

Can I use frozen blueberries?

Yes, and do not thaw them first. Toss them in flour straight from the freezer and fold gently. The bake time may be 3 to 5 minutes longer, so check with a toothpick.

Why did my blueberries sink to the bottom?

Usually that happens if the batter is too thin or the berries are too heavy with moisture. Coating them in a little flour and folding them in at the very end helps them stay suspended.

Can I skip the glaze?

Absolutely. The loaf is lovely on its own. You might dust the top with powdered sugar or brush it with a warm lemon sugar syrup while it’s still hot for extra moisture.

My glaze turned out runny, what did I do wrong?

You likely added too much lemon juice. Stir in another tablespoon of powdered sugar at a time until it thickens to a drizzle-able consistency that holds its shape on the loaf.

Lemon Blueberry Loaf Recipe

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 55 minutes mins

Total Time 1 hour hr 10 minutes mins

Servings: 8 servings

Calories: 410

Ingredients Method Notes

Ingredients

  

• 1 ½ cups all-purpose flour
• 1 tsp baking powder
• ¼ tsp baking soda
• ½ tsp fine sea salt
• ½ cup unsalted butter, softened
• 1 cup granulated sugar
• 2 large eggs, room temperature
• 2 tbsp lemon zest
• ¼ cup fresh lemon juice
• ½ cup full-fat sour cream
• 1 tsp vanilla extract
• 1 ½ cups fresh or frozen blueberries
• 1 cup powdered sugar
• 2 to 3 tbsp lemon juice (for glaze)

Method

 

1. Whisk the flour, baking powder, baking soda, and salt together in a bowl.
2. In a separate large bowl, cream the butter and sugar until light and fluffy, about 2 minutes. Beat in the eggs one at a time, then stir in the lemon zest, ¼ cup lemon juice, and vanilla.
3. Mix in the sour cream, then fold the dry ingredients into the wet mixture in two additions, stirring just until combined.
4. Heat oven to 350°F (177°C). Grease a 9×5-inch loaf pan and line with parchment. Toss the blueberries with a teaspoon of flour, fold them gently into the batter, and pour into the pan. Bake 50 to 55 minutes, until a toothpick comes out with moist crumbs. Cool in the pan 10 minutes, then lift out and cool completely on a rack.
5. Whisk the powdered sugar with 2 to 3 tablespoons lemon juice until thick but pourable. Drizzle over the cooled loaf, let set a few minutes, then slice and serve.

Notes

If your blueberries are large, halve them before folding into the batter to prevent heavy pockets. The loaf slices cleanest when completely cool, so have patience with the cooling rack.