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Lemon Blackberry Bundt Cake: Moist and Tender

  • 5 min read
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My Lemon Blackberry Cake is a moist, tender Bundt cake filled with fresh lemon flavor and a sweet, juicy blackberry swirl. The bright citrus complements the berries beautifully, and the blackberry layer adds a lovely pop of color and fruity depth to every slice. This cake is simple to prepare yet impressive for gatherings, afternoon coffee, or whenever blackberries are in season.

Sliced Lemon Blackberry cake

I enjoy shopping for seasonal fruit and often come home with more berries than I can eat. Fresh fruit has long inspired my baking. When I have an abundance of berries but no immediate plan, I test new recipes for my pound cake collection. For this cake, instead of folding whole berries into the batter, I puree them and swirl the puree into the cake. The interior takes on a beautiful light purple or pink hue (depending on the berries) and the swirl creates an attractive, flavorful ribbon while the cake remains tender, buttery, and moist.

The full recipe with exact measurements is provided in the recipe card below. The sections that follow outline key ingredients, helpful substitutions, and practical baking tips to ensure excellent results every time.

Key Ingredients and Substitutions

Below are the main ingredients used in this recipe and suggestions for acceptable substitutions.

  • Blackberries (fresh or frozen). Pureed blackberries create the swirl and fruity flavor. If using frozen berries, thaw them, drain off excess liquid, and gently pat them dry before pureeing. You can substitute similar berries—raspberries, blueberries, or strawberries—adjusting sweetness as needed.
  • Unbleached all-purpose flour and potato starch. This cake contains a relatively high proportion of liquid from sour cream and blackberries. Replacing a small portion of flour with potato starch keeps the crumb tender without becoming gummy from berry juices. If you don’t have potato starch, you can omit it and use only all-purpose flour; the cake will still be delicious but slightly different in texture.
  • Full-fat sour cream. Sour cream adds richness, keeps the cake moist, and its acidity balances the sugar. It also helps shorten baking time by keeping the batter tender. Stand-ins include buttermilk or plain Greek yogurt (full fat) in roughly equivalent volume.
  • Fresh lemon juice and lemon zest. Freshly squeezed lemon juice and grated zest provide bright, fresh citrus notes that pair exceptionally well with blackberries. Bottled juice won’t give the same freshness, so use fresh lemons when possible.

Baking Tips

  • Bring ingredients to room temperature before mixing. Room-temperature eggs, butter, and dairy incorporate more evenly for a lighter, more even crumb.
  • Avoid over-mixing once the flour is added. Mix on low speed and finish folding with a rubber spatula to preserve tenderness.
  • Because ovens vary, check the cake for doneness rather than relying only on the timer. The cake is ready when a skewer inserted into the center comes out with a few moist crumbs, not raw batter.

Note: Blackberry seeds are not removed in this recipe and remain slightly crunchy after baking. If you prefer a seedless texture, press the puree through a fine sieve before folding into the batter.

A bowl with mashed blackberries and a fork.
Use a fork to mash the blackberries.
A bowl with flour and another bowl with sour cream and lemon juice.
Measure dry ingredients separately and mix wet ingredients in another bowl.
A mixer bowl with creamed butter, sugar and an egg.
Cream butter and sugar until light and fluffy, then add the eggs one at a time.
A mixer bowl with cake batter, dry flour and a rubber spatula.
Alternate additions of dry ingredients and the sour cream mixture, starting and ending with dry.
A bowl with cake batter topped with blackberry puree.
Stir the blackberry puree into about one-third of the batter.
A bundt pan filled with lemon batter and blackberry batter.
Spoon batters into the pan in alternating scoops and swirl once.
Cake cooling on a wire rack

Storing and Freezing

Store the Lemon Blackberry Cake at room temperature, covered with foil or in an airtight container (a cake dome works well), for up to 2 days. This preserves moisture and flavor.

To freeze, wrap the cooled cake tightly in plastic wrap and place it inside a freezer-safe container or bag. It can be frozen for up to 2 months. Thaw the wrapped cake at room temperature before serving.

Whole lemon blackberry cake

Moist & Tender Lemon Blackberry Bundt Cake

This Lemon Blackberry Cake is a moist, tender Bundt cake with bright lemon flavor and a swirled blackberry puree. It’s ideal for summer gatherings or any time you want a show-stopping yet approachable cake.
Prep Time: 20 mins
Cook Time: 45 mins
Servings: 18 slices
Author: Dikla Levy Frances

Ingredients

  • 1 Cup (150g) Blackberries (fresh or frozen)
  • 2 3/4 + 1 TBS Cups (340g) All-purpose flour
  • 1.5 tsp Baking powder
  • 1/2 tsp Baking soda
  • 1 TBS Potato starch
  • 1 1/4 Cup (300ml) Sour cream, at room temperature
  • 1/4 Cup (60ml) Fresh squeezed lemon juice
  • 1 Cup (225g) Unsalted butter, softened
  • 2 1/2 Cups (500g) Sugar
  • 2 tsp Fresh lemon zest
  • 4 Large eggs, at room temperature

Instructions

  1. Preheat the oven to 350°F (175°C) and position the rack in the center. Grease a 12-cup Bundt pan thoroughly.
  2. Using a fork, mash the blackberries into a coarse puree. Place the puree in a fine sieve set over a bowl and press to remove excess juice if desired. Set aside the puree.
  3. Sift together the flour (340g), potato starch (1 tablespoon), baking powder (1.5 teaspoons), and baking soda (1/2 teaspoon). Stir to combine and set aside.
  4. In a large measuring cup, whisk the sour cream (300ml) with the lemon juice (60ml) until smooth.
  5. In the bowl of a stand mixer, beat the sugar (500g), softened butter (225g), and lemon zest on medium speed until light and fluffy, about 4–5 minutes.
  6. With the mixer on medium-high, add the eggs one at a time, allowing each to fully incorporate before adding the next.
  7. Reduce the mixer speed to low. Add the dry ingredients in three additions, alternating with the sour cream mixture in two additions. Start and finish with the dry ingredients.
  8. After the last addition, stop the mixer and finish folding with a rubber spatula to ensure no pockets of flour remain.
  9. Scoop about one-third of the batter into a clean bowl and fold in the blackberry puree until evenly combined.
  10. Spoon the batters into the prepared Bundt pan using medium scoops, alternating between the lemon batter and the blackberry batter to create a pattern.
  11. Use a wooden skewer or a butter knife to swirl the batters once. Swirl only a few times and avoid over-swishing to preserve the marbled pattern.
  12. Bake for 45–50 minutes, or until a skewer inserted into the center comes out with a few moist crumbs. Do not overbake.
  13. Remove the cake from the oven and allow it to cool in the pan for 15–20 minutes. Gently invert onto a wire rack and cool completely before slicing.

Tips: Swirl the batter sparingly to maintain a defined marbled effect. Allowing the cake to cool in the pan too long can cause sticking—remove it while still slightly warm.