Description
Delight in these zesty Lemon Poppy Seed Cupcakes topped with a vibrant Blackberry Buttercream frosting. Perfectly moist and bursting with fresh lemon flavor, these cupcakes combine the crunch of poppy seeds with a smooth, fruity frosting that adds a beautiful color and tangy sweetness. Ideal for spring gatherings, afternoon tea, or any occasion that calls for a refreshing, fruity treat.
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) and 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 until evenly combined.
- Cream Butter & Sugar: Beat the softened unsalted butter and granulated sugar together using an electric mixer until the mixture becomes light and fluffy, about 2–3 minutes.
- Add Eggs & Flavoring: Add the eggs one at a time, beating well after each addition. Mix in the fresh lemon zest, lemon juice, and vanilla extract to infuse the batter with vibrant citrus flavor.
- Incorporate Dairy: Beat in the sour cream until the mixture is smooth and well incorporated.
- Combine: Gradually add the dry ingredients in two additions, alternating with the whole milk. Mix gently just until combined, taking care not to overmix to maintain a tender cupcake crumb.
- Bake: Fill each cupcake liner about two-thirds full with batter. Bake in the preheated oven for 18–22 minutes or until a toothpick inserted into the center comes out clean.
- Cool Completely: Let the cupcakes 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 until the berries have broken down, about 5–7 minutes. Strain the mixture to remove seeds, return the puree to the pan, and simmer until it thickens to 2–3 tablespoons of concentrated puree. Allow to cool completely.
- Beat Butter: Using an electric mixer, beat the softened butter until creamy and pale in color.
- Add Sugar Gradually: Add powdered sugar one cup at a time, beating well between additions until the frosting reaches your desired sweetness and consistency.
- Add Flavor & Color: Mix the cooled blackberry puree, vanilla extract, and a pinch of salt into the buttercream. Adjust the powdered sugar if needed to reach the perfect consistency. If the frosting feels too soft, chill it for 15–20 minutes.
- Assemble: Pipe the blackberry buttercream frosting onto the fully cooled lemon poppy seed cupcakes. Garnish with fresh blackberries, lemon zest curls, or a light sprinkle of poppy seeds. Optionally, drizzle a lemon glaze for an extra zingy finish.
Notes
- Rub lemon zest into the sugar before creaming for a deeper citrus flavor.
- Use room temperature ingredients to ensure a smooth and well-incorporated batter.
- Thoroughly reduce the blackberry puree to avoid a runny frosting and achieve vibrant color.
- For extra lemon punch, consider adding ¼ tsp lemon extract to the batter.
- Allow cupcakes to cool completely before frosting to prevent the buttercream from melting.
- Store leftover cupcakes in an airtight container in the refrigerator for up to 3 days.
