Lemon Blueberry Loaf with Sour Cream and Citrus Syrup
This lemon blueberry loaf features a tender sour cream crumb, fresh berries, and a double hit of citrus with a warm lemon syrup soak and a tart glaze.
There is a specific joy in a perfect lemon blueberry loaf that manages to be both incredibly plush and vibrantly tart. To get that bakery-style texture, we rely on sour cream and a specific technique: creaming the lemon zest directly into the sugar to release every drop of essential citrus oil before the wet ingredients even hit the bowl.
This easy lemon blueberry loaf isn't just a standard quick bread; it’s treated like a cake. By tossing the blueberries in a spoonful of flour, we ensure they suspend perfectly in the batter rather than sinking to the bottom. We also poke the loaf while it’s still warm, pouring over a sharp lemon syrup that keeps the crumb moist for days.
Whether you call it a lemon blueberry bread or a loaf, the secret to success is the double-glaze method. The syrup provides the moisture, while the thick, opaque icing on top provides that satisfying crackle and punchy flavor that cuts through the buttery crumb.
Ingredients
The Loaf
- 1 1/2 cups (190g) all-purpose flour, plus 1 tablespoon for the berries
- 1 teaspoon baking powder
- 1/2 teaspoon kosher salt
- 1 cup (200g) granulated sugar
- 2 tablespoons freshly grated lemon zest (about 2 large lemons)
- 1/2 cup (115g) unsalted butter, softened
- 2 large eggs, room temperature
- 1/2 cup (120g) full-fat sour cream
- 1 teaspoon vanilla extract
- 1 1/2 cups (190g) fresh blueberries
Lemon Syrup Soak
- 1/4 cup (50g) granulated sugar
- 1/4 cup (60ml) fresh lemon juice
Lemon Glaze
- 1 cup (120g) powdered sugar, sifted
- 2 tablespoons fresh lemon juice
- 1 tablespoon heavy cream or milk (optional, for richness)
Instructions
- 1
Preheat your oven to 350°F (175°C) and grease a 9x5-inch loaf pan, lining the bottom with parchment paper for easy removal.
- 2
Whisk the 1 1/2 cups flour, baking powder, and salt together in a medium bowl and set aside.
- 3
Rub the lemon zest into the granulated sugar in a large bowl using your fingertips until the sugar is fragrant and moist.
- 4
Cream the softened butter and lemon-sugar together with a hand mixer or stand mixer until light and fluffy, about 3 minutes.
- 5
Add the eggs one at a time, beating well after each addition, then mix in the sour cream and vanilla extract.
- 6
Fold the dry ingredients into the wet ingredients using a spatula until just combined; do not overmix.
- 7
Toss the blueberries with the remaining 1 tablespoon of flour in a small bowl, then gently fold them into the batter.
- 8
Transfer the batter to the prepared pan and bake for 55–65 minutes, or until a skewer inserted into the center comes out clean.
- 9
Prepare the syrup by simmering the lemon juice and sugar in a small saucepan over medium heat until the sugar dissolves.
- 10
Poke holes all over the warm loaf using a skewer while it's still in the pan, then slowly pour the lemon syrup over the top.
- 11
Let the loaf cool completely in the pan before removing it to a wire rack.
- 12
Whisk the glaze ingredients together until smooth and thick, then pour over the cooled loaf, letting it drip down the sides.
Nutrition (per serving)
Estimates only — not medical or dietary advice.
- Calories
- 338 kcal
- Protein
- 3.5 g
- Carbs
- 53.5 g
- Fat
- 12.8 g
- Fiber
- 1.2 g
- Sugar
- 38.2 g
- Sodium
- 135 mg
Tips
- → Always use room temperature eggs and sour cream to ensure the batter emulsifies properly without curdling.
- → If using frozen blueberries, do not thaw them first; toss them in flour while frozen and expect to add 5-8 minutes to the baking time.
- → Measure your flour by weight or by spooning it into the cup and leveling it off; scooping directly with the measuring cup packs the flour and leads to a dry loaf.
FAQ
Why does my lemon blueberry loaf sink in the middle?
This usually happens if the loaf is underbaked or if too much leavening agent was used. Ensure your baking powder is fresh and use a thermometer to check that the internal temperature reaches 200°F (93°C).
Can I use bottled lemon juice for this recipe?
For the best flavor, use fresh lemons. Bottled juice often has a metallic aftertaste and lacks the essential oils found in the fresh zest used to flavor the sugar.
How do I keep the blueberries from sinking?
Tossing the berries in a tablespoon of flour creates a rough surface that helps the batter 'grip' the fruit, keeping them suspended during the bake.
How should I store this loaf?
Store the loaf in an airtight container at room temperature for up to 3 days, or refrigerate for up to 5 days. It also freezes beautifully for up to 3 months.
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