"Light and Fluffy Lemon Cupcakes are topped with gorgeous swirls of Blackberry Buttercream!..."
INGREDIENTS
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For the cupcakes:
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1 3/4 cups cake flour
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1 1/4 teaspoons baking powder
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1/2 teaspoon baking soda
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1/4 teaspoon salt
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1/2 cup sour cream (I used full fat)
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1/2 cup milk (I used whole)
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2 teaspoons vanilla extract
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2 large egg whites, at room temperature
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1 stick (4 ounces) unsalted butter, melted
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1 cup granulated sugar
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*Zest of one lemon (about 2 teaspoons)
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For the Blackberry Buttercream:
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1 cup blackberries
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2 tablespoons lemon juice
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2 sticks (8 ounces) unsalted butter, VERY soft
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1/2 teaspoon salt (do not SKIP!)
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4 cups confectioners sugar (more if needed), sifted