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Blueberry-Lemon Sour Cream Cake

A masterclass in crumb hydration and fruit suspension. By utilizing full-fat sour cream and vegetable oil, this highly tender, bright Meyer lemon cake achieves an incredibly moist architecture capable of suspending two massive layers of cornstarch-dusted blueberries without sinking.
Print Recipe
Prep Time 15 minutes
Cook Time 55 minutes
Total Time 1 hour 10 minutes
Servings: 8 servings
Course: Dessert
Ingredients Method

Ingredients
  

The Dry Architecture
  • 2 cups unbleached all-purpose flour
  • 2 teaspoons baking powder
  • ½ teaspoon ground nutmeg
  • ¼ teaspoon kosher salt
The Wet Emulsion & Acidic Lift
  • 2 large eggs
  • 1 cup granulated sugar
  • 1 cup full-fat sour cream
  • ½ cup vegetable oil
  • 1 teaspoon pure vanilla extract
  • 2 tablespoons fresh Meyer lemon juice from 1 lemon
  • 1 tablespoon fresh Meyer lemon zest from 1 lemon
The Fruit Suspension
  • 2 pints fresh blueberries
  • 1 teaspoon cornstarch
  • Confectioners’ sugar for dusting

Method
 

The Emulsion Build
  1. Preheat the oven to 375°F. Generously grease a 9-inch metal springform pan and line the bottom tightly with parchment paper.
  2. In a small ceramic bowl, vigorously whisk together the all-purpose flour, baking powder, ground nutmeg, and kosher salt to ensure the leavening agents are perfectly distributed.
  3. In a large mixing bowl, use an electric hand mixer (or stand mixer) to beat the large eggs and granulated sugar together on medium-high speed until the mixture becomes highly pale yellow, aerated, and fluffy.
  4. Reduce the mixer speed to low. Stream in the sour cream, vegetable oil, and pure vanilla extract until fully unified into a rich, glossy emulsion.
  5. Stir the fresh Meyer lemon juice and the bright lemon zest directly into the wet ingredients to establish the acidic foundation.
The Crumb Integration & Fruit Prep
  1. Gradually fold the dry flour mixture into the wet sour cream emulsion. Mix only until the flour is just combined to prevent overworking the gluten, which leads to a dense, tough cake.
  2. In a separate bowl, toss the fresh blueberries aggressively with the 1 teaspoon of cornstarch. (This crucial architectural step creates a starchy barrier that prevents the heavy fruit from sinking to the bottom of the batter during the bake).
The Architectural Layering & Bake
  1. Pour exactly half of the thick cake batter into the prepared springform pan, using an offset spatula to smooth it into an even layer.
  2. Scatter half of the cornstarch-dusted blueberries evenly over this foundational layer.
  3. Spoon the remaining batter directly over the berries, spreading it gently to cover them.
  4. Scatter the remaining blueberries heavily across the absolute top of the cake.
  5. Bake in the preheated oven for 50 to 60 minutes. The cake is finished when the top is deeply golden brown, the berries are bursting, and a wooden tester inserted into the center comes out with moist crumbs rather than wet batter.
The Structural Cool
  1. Transfer the cake to a wire rack to cool in the pan for 10 to 15 minutes. This resting phase allows the dense, fruit-heavy crumb to properly set.
  2. Carefully release and remove the outer ring of the springform pan. Liberally dust the top of the warm cake with confectioners' sugar before slicing.