Ingredients

• 1 1/2 cups granulated sugar
• 1 stick (1/2 cup) unsalted butter
• 4 egg whites
• Zest of 2 lemons
• Juice of 2 lemons
• 2 cups all-purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 2/3 cup buttermilk
• 2 cups blueberries
• 1/3 cup granulated sugar
• Cream Cheese Frosting:
• 1 cup (2 sticks) unsalted butter
• 8 ounces cream cheese
• 7 1/2 cups powdered sugar
• 1 tablespoon vanilla extract
• 1/2 teaspoon salt

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Instructions

1. For the cupcakes: Preheat the oven to 350 degrees F. Fill the cupcake pan with paper liners.
2. Beat the granulated sugar and butter until light and fluffy in a standing mixer. Beat in the eggs. Add the lemon zest and juice and beat until combined.
3. Sift the flour, baking powder, baking soda and salt in a separate bowl. Alternately add the buttermilk and flour mixture to the standing mixer, beating well between each addition.
4. Fill the cupcake liners two-thirds full. Bake the cupcakes until a toothpick inserted comes out clean, 18 to 22 minutes. Refrigerate the cupcakes until they are completely cooled.
5. For the filling: Cook 1/3 cup water, 1 cup of the blueberries and granulated sugar over medium heat for 10 minutes, stirring frequently. Once the blueberries begin to burst, add the remaining 1 cup blueberries and cook on medium heat, 8 to 10 minutes. The filling is done when it coats the back of a metal spoon.
6. For the frosting: Beat the butter and cream cheese until light and fluffy in a standing mixer. Add the powdered sugar, vanilla and salt. Beat until light and fluffy.
7. Core the cupcakes using an apple corer. Fill each cupcake core with the blueberry compote filling and top with the cream cheese frosting.