Lemon-Blueberry Cupcakes with Blueberry-Lemon Buttercream Frosting

Tart and sweet with beautiful color and bake shop appeal, these lemony cupcakes are moist and fruity with a vibrant frosting made with homemade blueberry jam.

• Preparation Time: 2 hr 50 mins
• Cooking Time: 40 mins
• Total Time: 3 hr 30 mins
• Calories: 345 Calories

Ingredients

• 1 cup white sugar
• 2 tablespoons white sugar
• 3 tablespoons lemon juice
• 2 teaspoons baking powder
• 1 cup unsalted butter, softened
• 2 teaspoons lemon zest
• 1 teaspoon lemon juice
• 1 tablespoon all-purpose flour
• 1 tablespoon heavy cream
• 2 large eggs, at room temperature
• 0.5 teaspoon salt
• 0.5 teaspoon vanilla extract
• 0.5 cup unsalted butter, softened
• 0.125 teaspoon salt
• 1.75 cups all-purpose flour
• 1.5 teaspoons lemon juice
• 1.5 cups frozen blueberries
• 3.5 cups powdered sugar
• 1.5 tablespoons lemon zest
• 0.667 cup buttermilk, at room temperature

Recipe Instructions

Step 1

Preheat the oven to 350 degrees F (175 degrees C). Line 18 muffin cups with paper liners.

Step 2

Frost cooled cupcakes.

Step 3

Combine frozen blueberries, sugar, and lemon juice for jam in a small pot over medium heat; bring to a simmer. Cook, stirring occasionally, until mixture has reduced and thickened, about 12 minutes. Remove from the heat.

Step 4

Pour mixture through a fine mesh sieve, pressing solids to extract as much jam as possible; you should have approximately 1/4 cup. Discard any solids and refrigerate jam until completely cool, at least 30 minutes.

Step 5

Whisk flour, baking powder, and salt for cupcakes together in a small bowl.

Step 6

Cream sugar and butter together in a large bowl until light and fluffy. Beat in eggs, 1 at a time, mixing well after each addition. Mix in lemon juice, lemon zest, and vanilla until combined. Add flour mixture in 2 batches, alternating with buttermilk, beating batter just until combined after each addition; batter will be somewhat thick.

Step 7

Place frozen blueberries in a small bowl and toss with flour until coated. Add to the batter and fold to incorporate. Spoon batter into the prepared muffin cups, filling each one 3/4 full.

Step 8

Bake in the preheated oven for 20 minutes. Check to see if a toothpick inserted into the centers comes out clean, and continue to bake, if needed, for 4 to 8 more minutes. Cool in the pans for 5 minutes before removing to a wire rack to cool completely, about 20 minutes more.

Step 9

While the cupcakes are cooling, remove blueberry jam from the refrigerator. Measure out 1/4 cup for the frosting and reserve any extra for another use.

Step 10

Beat butter for frosting in a large bowl until creamy and smooth. Add 1 cup powdered sugar, lemon zest, lemon juice, and salt; beat until thoroughly combined. Add 1/4 cup blueberry jam and mix until combined. Add 1 cup powdered sugar and mix until smooth. Repeat with remaining 1 1/2 cups powdered sugar. Add heavy cream and beat until frosting is smooth and fluffy, 1 to 2 minutes more.