Lemon Poppy Seed Cupcakes with Blackberry Frosting

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March 19, 2026

Lemon Poppy Seed Cupcakes with Blackberry Frosting

Lemon poppy seed cupcakes with blackberry frosting bring together bright citrus flavor and beautiful color in a delightful treat. These cupcakes are perfect for birthdays, spring celebrations, or any time you crave something sweet. Their light texture and refreshing taste make them hard to resist.

Why You’ll Love This Lemon Poppy Seed Cupcake Recipe

This recipe is a winner for several reasons. First, the combination of zesty lemon and nutty poppy seeds creates a flavor that is both refreshing and unique. The blackberry frosting adds a fruity touch and a stunning visual appeal. Additionally, these cupcakes are easy to make, making them perfect for both novice and experienced bakers. Whether you want to impress guests or enjoy a sweet treat at home, these cupcakes deliver joyful flavors and aesthetics.

How to Make Lemon Poppy Seed Cupcakes with Blackberry Frosting

Ingredients:

  • For the Cupcakes:
    • 1 ½ cups all-purpose flour
    • 1 teaspoon baking powder
    • ½ teaspoon baking soda
    • ¼ teaspoon salt
    • ½ cup unsalted butter, softened
    • 1 cup granulated sugar
    • 2 large eggs
    • Zest of 1 lemon
    • ½ cup buttermilk
    • 1 tablespoon fresh lemon juice
    • 1 tablespoon poppy seeds
  • For the Blackberry Frosting:
    • 1 cup unsalted butter, softened
    • 4 cups powdered sugar
    • 2 tablespoons heavy cream
    • 1 cup blackberry puree (fresh or frozen blackberries blended)
    • 1 teaspoon vanilla extract
    • Pinch of salt

Step-by-Step Instructions:

  1. Preheat the Oven:
    Preheat your oven to 350°F (175°C). Line a cupcake pan with paper liners.
  2. Prepare the Dry Ingredients:
    In a bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
  3. Cream the Butter and Sugar:
    In a large bowl, beat the softened butter and sugar together until light and fluffy. This should take about 3-5 minutes.
  4. Add Eggs and Lemon:
    Add the eggs, lemon zest, and lemon juice to the butter mixture. Beat until fully combined.
  5. Mix the Dry Ingredients:
    Gradually add the dry ingredients to the wet mixture, alternating with the buttermilk. Mix until just combined. Be careful not to overmix.
  6. Fold in Poppy Seeds:
    Gently fold in the poppy seeds.
  7. Fill the Cupcake Liners:
    Divide the batter evenly among the cupcake liners, filling each about two-thirds full.
  8. Bake the Cupcakes:
    Bake in the preheated oven for 18-20 minutes, or until a toothpick inserted in the center comes out clean.
  9. Cool the Cupcakes:
    Allow the cupcakes to cool in the pan for 5 minutes, then transfer them to a wire rack to cool completely.
  10. Prepare the Blackberry Frosting:
    In a mixing bowl, beat the softened butter until creamy. Gradually add the powdered sugar, alternating with the heavy cream. Mix until well combined.
  11. Add Blackberries and Flavor:
    Stir in the blackberry puree, vanilla extract, and a pinch of salt. Beat until fluffy and smooth.
  12. Frost the Cupcakes:
    Once the cupcakes are completely cool, frost them generously with the blackberry frosting using a pastry bag or a knife.

How to Serve Lemon Poppy Seed Cupcakes with Blackberry Frosting

Serve these cupcakes fresh for the best taste. You can garnish them with additional blackberry pieces or a sprinkle of lemon zest for a pop of color. They pair beautifully with a cup of tea or coffee, making them perfect for afternoon gatherings or special occasions.

Lemon Poppy Seed Cupcakes with Blackberry Frosting

How to Store Lemon Poppy Seed Cupcakes

Store any leftover cupcakes in an airtight container at room temperature for up to 3 days. If you want to keep them longer, place them in the refrigerator for up to a week. You can also freeze the unfrosted cupcakes for up to 3 months. Just thaw them at room temperature before frosting.

Tips to Make Lemon Poppy Seed Cupcakes Perfect

  • Measure Carefully: Accurate measurements of flour and sugar are crucial for the right texture.
  • Use Fresh Ingredients: Fresh lemons and high-quality butter can significantly enhance flavor.
  • Don’t Overmix: Overmixing the batter can lead to dense cupcakes. Mix until just combined.
  • Cool Completely: Ensure that the cupcakes are cool before frosting to prevent the frosting from melting.

Flavor Variations

  • Lemon Blueberry Cupcakes: Substitute blackberries with fresh blueberries for a different berry flavor.
  • Mango Frosting: Use mango puree instead of blackberry for a tropical twist.
  • Nutty Addition: Toss in some chopped walnuts or almonds for added texture.

Pro Tips for Success

  • Room Temperature Ingredients: Use room temperature butter and eggs for an easier mixing process.
  • Prevent Sinking: If your poppy seeds settle, try coating them in flour before adding them to the batter.
  • Frosting Consistency: If the frosting is too thick, add a bit more cream until you reach your desired consistency.

FAQs About Lemon Poppy Seed Cupcakes

Can I make these cupcakes gluten-free?

Yes, you can use a gluten-free all-purpose flour blend as a substitute for regular flour. Be sure to check that all other ingredients are also gluten-free.

How can I make the frosting without blackberries?

If blackberries are not available, you can use other berry purees like raspberry or strawberry, or even lemon curd for a citrusy frosting.

Can I make the cupcakes in advance?

Absolutely! You can bake the cupcakes ahead of time and store them in the freezer. Just frost them when you’re ready to serve for the best texture and flavor.

Final Thoughts

Lemon poppy seed cupcakes with blackberry frosting are a delightful treat that offers a perfect balance of flavors. They are easy to make and will undoubtedly impress anyone who tastes them. Whether for a special occasion or just a sweet snack, these cupcakes will brighten your day. Enjoy the bright zesty flavor and the beautiful blackberry hue, and delight your family and friends with this lovely dessert!

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

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