Description
These Lemon Poppy Seed Cupcakes are moist, tangy, and bursting with fresh lemon flavor, complemented by crunchy poppy seeds and a luscious blackberry buttercream frosting. Perfect for spring and summer gatherings, these cupcakes offer a delightful balance of tart and sweet with a creamy, colorful topping.
Ingredients
Scale
Dry Ingredients
- 1½ cups (190g) all-purpose flour
- 1½ tbsp poppy seeds
- 1½ tsp baking powder
- ¼ tsp baking soda
- ¼ tsp salt
Wet Ingredients
- ½ cup (115g) unsalted butter, softened
- ¾ cup (150g) granulated sugar
- 2 large eggs (room temperature)
- 2 tbsp lemon zest (about 2 lemons)
- ¼ cup (60ml) fresh lemon juice
- ½ cup (120g) sour cream (or Greek yogurt)
- ¼ cup (60ml) whole milk
- 1 tsp pure vanilla extract
Blackberry Buttercream Frosting
- 1 cup (150g) fresh blackberries
- 1 tbsp lemon juice
- ¾ cup (170g) unsalted butter, softened
- 3–4 cups (360–480g) powdered sugar
- ½ tsp vanilla extract
- Pinch of salt
Instructions
- Preheat & Prep: Preheat your oven to 350°F (175°C). Line a muffin pan with cupcake liners to prepare for baking.
- Mix Dry Ingredients: In a medium bowl, whisk together the all-purpose flour, poppy seeds, baking powder, baking soda, and salt to evenly distribute the leavening agents and seeds.
- Cream Butter & Sugar: Using a mixer, beat the softened butter and granulated sugar until the mixture becomes light and fluffy, about 2 to 3 minutes. This step aerates the batter for tender cupcakes.
- Add Eggs & Flavoring: Incorporate the eggs one at a time, beating well after each addition. Then mix in the lemon zest, fresh lemon juice, and vanilla extract for robust citrus flavor.
- Incorporate Dairy: Beat in the sour cream until the batter is smooth and creamy, adding moisture and tanginess.
- Combine: Add the dry ingredients in two parts, alternating with the milk, starting and ending with the dry ingredients. Mix gently just until combined to prevent overmixing.
- Bake: Fill each cupcake liner about two-thirds full with the batter. Bake in the preheated oven for 18 to 22 minutes, or until a toothpick inserted into the center comes out clean.
- Cool Completely: Allow the cupcakes to cool in the pan for 5 minutes, then transfer them onto a wire rack to cool completely before frosting.
- Make Blackberry Reduction: In a small saucepan, simmer the fresh blackberries and lemon juice over medium heat for 5 to 7 minutes until the berries break down. Strain the seeds out and return the puree to the pan. Simmer further until reduced to about 2 to 3 tablespoons of concentrated puree. Let it cool completely.
- Beat Butter for Frosting: Beat the softened unsalted butter until it becomes creamy and pale in color.
- Add Sugar Gradually: Gradually add powdered sugar one cup at a time to the butter, beating well after each addition to create a smooth frosting base.
- Add Flavor & Color: Mix the cooled blackberry puree, vanilla extract, and a pinch of salt into the buttercream. Adjust the powdered sugar quantity to achieve your desired consistency. If the frosting is too soft, chill it for 15 to 20 minutes before frosting the cupcakes.
- Assemble: Pipe the blackberry buttercream onto the fully cooled cupcakes. Garnish each with fresh blackberries, curls of lemon zest, or a light sprinkle of poppy seeds. Optionally, add a small drizzle of lemon glaze for extra zing.
Notes
- Rub lemon zest into the sugar before creaming for a more intense citrus flavor.
- Use room temperature ingredients for a smoother, well-emulsified batter.
- Ensure blackberry puree is well-reduced to prevent runny frosting.
- For an extra lemon punch, add ¼ teaspoon lemon extract to the batter.
- Line muffin pan with liners to prevent sticking and ease cleanup.
