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Lemon Poppy Seed Cupcakes with Blackberry Frosting

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  • Author: Lily Carter
  • Prep Time: 20 minutes
  • Cook Time: 20 minutes
  • Total Time: 40 minutes
  • Yield: 14-18 cupcakes (adjusted for extra servings) 1x
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

These Lemon Poppy Seed Cupcakes with Blackberry Frosting are a delightful blend of citrusy brightness, subtle crunch, and creamy, fruity frosting. Light, fluffy, and full of flavor, they’re perfect for spring gatherings, birthdays, or any time you crave a refreshing dessert.


Ingredients

Units Scale

For the Cupcakes:

  • 1 3/4 cups all-purpose flour
  • 1 1/2 tablespoons poppy seeds
  • 1 1/2 teaspoons baking powder
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1/2 cup unsalted butter, softened
  • 3/4 cup granulated sugar
  • 2 large eggs
  • Zest of 2 lemons
  • 1/4 cup fresh lemon juice
  • 1 teaspoon vanilla extract
  • 1/2 cup milk or buttermilk

For the Blackberry Frosting:

  • 3/4 cup fresh blackberries
  • 1/2 cup unsalted butter, softened
  • 2 1/2 cups powdered sugar
  • 1/2 teaspoon vanilla extract
  • 1 tablespoon lemon juice

Instructions

  1. Preheat & Prep: Preheat oven to 350°F (175°C) and line a cupcake tin with liners.
  2. Mix Dry Ingredients: In a bowl, whisk together flour, poppy seeds, baking powder, baking soda, and salt.
  3. Cream Butter & Sugar: In a separate bowl, beat butter and sugar until light and fluffy. Add eggs one at a time, then mix in lemon zest, lemon juice, and vanilla.
  4. Combine Wet & Dry: Gradually add the dry ingredients to the wet, alternating with milk, mixing until just combined.
  5. Bake: Scoop batter into cupcake liners (¾ full). Bake for 18-22 minutes or until a toothpick inserted in the center comes out clean. Let cool completely.
  6. Make Frosting: Puree blackberries and strain out seeds. Beat butter until creamy, then gradually add powdered sugar, blackberry puree, vanilla, and lemon juice. Beat until smooth and fluffy.
  7. Frost & Serve: Pipe or spread frosting onto cooled cupcakes and enjoy!

Notes

  • For extra lemon flavor, add ½ teaspoon lemon extract.
  • If the frosting is too soft, chill it for 15 minutes before piping.
  • Store unfrosted cupcakes in an airtight container at room temp for up to 2 days.

Nutrition

  • Calories: 245
  • Sugar: 27g
  • Sodium: 120mg
  • Fat: 10g
  • Saturated Fat: 6g
  • Unsaturated Fat: 3g
  • Trans Fat: 0g
  • Carbohydrates: 35g
  • Fiber: 1g
  • Protein: 3g
  • Cholesterol: 45mg