Lemon Blueberry Loaf with a Tender Crumb
A bright, moist cake where pockets of blueberries stay suspended throughout, thanks to a simple flour-coating trick.
The secret to keeping blueberries from sinking to the bottom of your loaf is coating them in a light dusting of flour before folding them in. This works because the flour creates a slight grip against the wet batter, holding the berries up as everything bakes. You’ll use just a tablespoon or two of the flour already measured for the cake—nothing extra needed.
The lemon comes through in two ways here: fresh zest mixed into the dry ingredients for brightness, and a splash of juice stirred into the batter for subtle tang. Don’t skip the zest; it’s where the real lemon flavor lives. The batter comes together quickly with the creaming method, and you’ll know you’re done mixing when the dry ingredients just disappear into the wet ingredients—overworking develops gluten and makes the crumb tough instead of tender.
This loaf keeps well for several days wrapped in plastic, and the flavors actually deepen slightly after the first day. The berries soften into the cake, creating little pockets of jammy sweetness.
Lemon Blueberry Loaf with a Tender Crumb
Serves 8 to 10 slices · Prep 15 minutes · Cook 50 minutes
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Preheat your oven to 350°F and grease an 8-by-4-inch loaf pan, lining the bottom with parchment paper for easy release.
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In a small bowl, whisk together the flour, baking powder, salt, and lemon zest until the zest is evenly distributed and you smell bright lemon throughout.
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In a large bowl, beat the softened butter and sugar together for about 2 minutes until the mixture looks pale and fluffy, scraping down the sides once.
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Add the whole egg and egg yolk one at a time, beating well after each addition until each one is fully incorporated and the mixture looks creamy.
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Stir the lemon juice into the sour cream and let it sit for a moment—it will thicken slightly and become tangy.
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Add half the sour cream mixture and half the dry ingredients to the butter mixture, folding gently with a rubber spatula just until combined, then repeat with the remaining ingredients.
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Stir in the vanilla extract with just a few folds—the batter should look thick and fluffy with no visible streaks of flour.
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Put the blueberries in a separate bowl and sprinkle about 1 tablespoon of the dry flour mixture over them, tossing gently to coat each berry lightly and evenly.
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Fold the flour-coated blueberries into the batter with a gentle hand, using as few folds as possible to distribute them without breaking them apart.
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Pour the batter into the prepared pan and smooth the top gently with a spatula.
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Bake for 48 to 52 minutes, until a toothpick inserted in the center comes out with just a few moist crumbs clinging to it—not completely clean, but not wet.
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Let the loaf cool in the pan for 10 minutes, then turn it out onto a wire rack to cool completely, about 1 hour.
