This lemon blueberry pound cake is a dense, buttery loaf with a tight, moist crumb, bright with lemon zest and dotted with blueberries that stay put instead of sinking. Sour cream keeps it tender for days, and a sharp lemon glaze sets into a thin crackly shell. It takes 20 minutes to mix and about an hour to bake.
What keeps the blueberries from sinking?
Blueberries are heavier than the batter around them, and once the fat melts in the oven the batter thins out and lets them drop. Three steps keep them suspended.
- Toss them in flour. A tablespoon of flour coats the berries, soaks up surface juice and gives them a little grip.
- Keep the batter thick. Room temperature ingredients and a proper creaming give a batter stiff enough to hold fruit. A runny, split batter lets everything fall.
- Layer it. Spread about a quarter of the plain batter in the pan first, fold the berries into the rest, then spoon it on top. Scatter a few extra berries over the surface.
Fold the berries in with a spatula, using as few strokes as you can. Crushed berries streak the batter purple and green, which is harmless but less pretty. Smaller wild blueberries distribute more evenly than big cultivated ones, if you can find them.
Why cream the butter and sugar for so long?
A pound cake has only a little baking powder, so most of its lift comes from air beaten into the butter. Sugar crystals cut tiny pockets into the fat, and those pockets expand in the oven. Two minutes of creaming won't do it. You're looking for 4 to 5 minutes on medium speed, until the mixture turns pale, almost white, and looks fluffy.
Temperature matters here. Butter should be around 65°F: it takes a fingerprint easily but doesn't look greasy. Too cold and it won't trap air; too warm and the air escapes. Eggs and sour cream should be at room temperature too. Cold eggs firm up the butter and the batter curdles.
Add the eggs one at a time and beat each for about 30 seconds. If the batter looks slightly broken after the last egg, don't worry, it'll come back together once the flour goes in. Then switch to low speed and mix just until the flour disappears, so the crumb stays tender rather than chewy.
Fresh vs frozen blueberries: which works better?
Both work, with a couple of adjustments. Fresh berries hold their shape best and bleed the least. Rinse them, then dry them well on a towel, since water on the skins makes the flour coating turn to paste.
Frozen berries are fine and sometimes better value out of season. Keep them frozen until the moment you fold them in; thawed berries collapse and turn the batter blue gray. Toss them in the flour straight from the freezer and expect the bake to run 5 to 10 minutes longer, because they cool the batter around them.
Either way, 1 cup is the right amount for this loaf. More fruit adds moisture the batter can't absorb and leaves a wet streak along the bottom. If you like a bigger fruit hit, serve slices with extra berries and a spoon of whipped cream, the same softly whipped cream that tops a berry pavlova.
When is a lemon blueberry pound cake done?
A 9 by 5 inch loaf of this size bakes for 60 to 70 minutes, but the pan, your oven and the berries all shift the timing. Check several signs rather than one.
| Check | Underbaked | Done |
|---|---|---|
| Skewer in the center | Wet batter clings | A few moist crumbs, no wet batter |
| Internal temperature | Below 200°F | 205 to 210°F |
| Crack along the top | Looks shiny and damp | Looks dry and golden |
| Sides | Still stuck to the pan | Just pulling away |
A skewer can hit a blueberry and come out purple and wet, so test in two spots. If the top browns before the middle is set, lay a loose sheet of foil over the pan after about 45 minutes. Cool the cake in the pan for 15 minutes, then lift it out by the parchment so it doesn't steam and turn gummy.
Glazing, slicing and storing the loaf
Let the loaf cool completely, about an hour on a rack, before glazing. On a warm cake the glaze melts and soaks in instead of setting into a shell. Stir powdered sugar with lemon juice until it's thick enough to fall from a spoon in a slow ribbon, then pour it along the top and let it run down the sides. It firms up in about 20 minutes.
Slice with a serrated knife, about 3/4 inch thick. The cake is good plain with coffee and even better lightly toasted in a skillet with a little butter the next morning.
Wrapped well, it keeps at room temperature for 3 days and actually tastes more lemony on day two. It also freezes well for up to 3 months, unglazed and double wrapped. For a summer dessert spread, it sits nicely beside a warm peach galette, which covers the flaky, fruit forward side of the table.
The recipe
Lemon Blueberry Pound Cake with Lemon Glaze
Ingredients
For the cake
- 1 1/2 cups (190 g) all-purpose flour, plus 1 tablespoon for the berries
- 1/2 teaspoon baking powder
- 1/2 teaspoon fine sea salt
- 1 cup (200 g) granulated sugar
- 1 tablespoon finely grated lemon zest (from 2 lemons)
- 3/4 cup (170 g) unsalted butter, softened to about 65°F
- 3 large eggs, at room temperature
- 1/2 cup (120 g) full fat sour cream, at room temperature
- 2 tablespoons fresh lemon juice
- 1 teaspoon pure vanilla extract
- 1 cup (150 g) fresh or frozen blueberries
For the lemon glaze
- 1 cup (120 g) powdered sugar
- 2 tablespoons fresh lemon juice
Instructions
- Prepare the pan. Heat the oven to 350°F (175°C). Butter a 9 by 5 inch loaf pan and line it with a parchment sling that hangs over the long sides.
- Mix dry ingredients. Whisk the 1 1/2 cups flour, baking powder and salt in a bowl. In the mixer bowl, rub the lemon zest into the sugar with your fingertips until fragrant and damp, about 1 minute.
- Cream butter and sugar. Add the butter to the lemon sugar and beat on medium speed for 4 to 5 minutes, until pale and fluffy. Beat in the eggs one at a time, about 30 seconds each, then the sour cream, lemon juice and vanilla.
- Add flour and berries. On low speed, mix in the flour just until it disappears. Toss the blueberries with the remaining 1 tablespoon flour, spread a quarter of the plain batter in the pan, fold the berries into the rest and spoon it on top.
- Bake the loaf. Bake for 60 to 70 minutes, until a skewer in the center shows only moist crumbs and the inside reads 205 to 210°F. Tent loosely with foil after 45 minutes if the top browns quickly.
- Cool completely. Cool in the pan for 15 minutes, lift the cake out using the parchment and cool on a rack for about 1 hour.
- Glaze and slice. Stir the powdered sugar and lemon juice into a thick glaze and pour it over the cooled loaf. Let it set for 20 minutes before slicing.
Cook's notes
- Greek yogurt or plain whole milk yogurt can replace the sour cream one for one.
- Keep the cake wrapped at room temperature for up to 3 days, or freeze it unglazed for up to 3 months.
- For a tangier cake, brush the warm loaf with 2 tablespoons lemon juice mixed with 1 tablespoon sugar before it cools, then glaze once cold.
Lemon Blueberry Pound Cake questions
Why is my pound cake dense and gummy at the bottom?
A gummy streak usually comes from underbaking, cold ingredients or too much fruit. Bake until the center reads 205 to 210°F, bring the butter, eggs and sour cream to room temperature, and keep the blueberries to 1 cup. Lifting the cake out of the pan after 15 minutes also stops trapped steam from softening the base.
Can you make lemon blueberry pound cake in a Bundt pan?
Yes, but double the recipe for a standard 10 to 12 cup Bundt pan. Grease every crevice well with butter and flour. The larger cake bakes for about 65 to 75 minutes at 350°F; check with a skewer and for an internal temperature of 205 to 210°F before turning it out.
Should you glaze the loaf the day you bake it?
Glaze it on the day you plan to serve it. Bake the loaf up to 2 days ahead and keep it tightly wrapped at room temperature, where the lemon flavor deepens. For longer storage, freeze the unglazed loaf, double wrapped, for up to 3 months, thaw it overnight on the counter, then pour on the glaze.
Do Meyer lemons work in this pound cake?
Yes. Meyer lemons are sweeter and more floral than regular lemons, with thinner skins. Use the same amount of zest and juice, but the glaze will be less sharp. Add a teaspoon more juice to the glaze if you want more tang, or mix Meyer and regular lemons for a balance of both.
Keep cooking
