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Lemon poppy seed cupcakes topped with blackberry frosting on a white plate.

Lemon Poppy Seed Cupcakes with Blackberry Frosting

Delightful lemon poppy seed cupcakes topped with fruity blackberry frosting, perfect for any celebration or sweet craving.
Servings 12 cupcakes
Prep Time 20 minutes
Cook Time 20 minutes
Total Time 40 minutes

Ingredients

For the Cupcakes

  • 1.5 cups 1 ½ cups all-purpose flour
  • 1 teaspoon 1 teaspoon baking powder
  • 0.5 teaspoon ½ teaspoon baking soda
  • 0.25 teaspoon ¼ teaspoon salt
  • 0.5 cups ½ cup unsalted butter, softened Ensure butter is at room temperature for easier mixing.
  • 1 cups 1 cup granulated sugar
  • 2 large 2 large eggs Make sure eggs are at room temperature.
  • 1 Zest of 1 lemon Use a zester for best results.
  • 0.5 cups ½ cup buttermilk You can substitute with milk and vinegar.
  • 1 tablespoon 1 tablespoon fresh lemon juice
  • 1 tablespoon 1 tablespoon poppy seeds

For the Blackberry Frosting

  • 1 cups 1 cup unsalted butter, softened Should be at room temperature.
  • 4 cups 4 cups powdered sugar Sift if lumpy.
  • 2 tablespoons 2 tablespoons heavy cream
  • 1 cups 1 cup blackberry puree (fresh or frozen blackberries blended) Make sure to blend until smooth.
  • 1 teaspoon 1 teaspoon vanilla extract
  • 1 pinch Pinch of salt

Instructions

Preparation

  • Preheat your oven to 350°F (175°C) and line a cupcake pan with paper liners.
  • In a bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
  • In a large bowl, beat the softened butter and sugar together until light and fluffy, about 3-5 minutes.
  • Add the eggs, lemon zest, and lemon juice to the butter mixture and beat until fully combined.
  • Gradually add the dry ingredients to the wet mixture, alternating with the buttermilk, mixing until just combined.
  • Gently fold in the poppy seeds.
  • Divide the batter evenly among the cupcake liners, filling each about two-thirds full.
  • Bake in the preheated oven for 18-20 minutes, or until a toothpick inserted in the center comes out clean.
  • Allow the cupcakes to cool in the pan for 5 minutes, then transfer them to a wire rack to cool completely.

Frosting

  • In a mixing bowl, beat the softened butter until creamy.
  • Gradually add the powdered sugar, alternating with the heavy cream, and mix until well combined.
  • Stir in the blackberry puree, vanilla extract, and a pinch of salt, and beat until fluffy and smooth.
  • Once the cupcakes are completely cool, frost them generously with the blackberry frosting using a pastry bag or a knife.

Notes

For best taste, serve cupcakes fresh. Garnish with additional blackberry pieces or a sprinkle of lemon zest. Store leftovers in an airtight container at room temperature for up to 3 days or refrigerate for up to a week. Unfrosted cupcakes can be frozen for up to 3 months.

Nutrition

Serving: 1gCalories: 320kcalCarbohydrates: 42gProtein: 2gFat: 16gSaturated Fat: 10gSodium: 150mgFiber: 1gSugar: 30g
Calories: 320kcal
Course: Dessert, Snack
Cuisine: American, Bakery
Keyword: Blackberry Frosting, cupcake recipe, Lemon Cupcakes, Poppy Seed Cupcakes, Spring Desserts