Super soft and fluffy lemon cupcakes topped with homemade blackberry buttercream frosting. They’re easy to make – and even easier to EAT! This is one cupcake flavor duo you don’t want to miss!
Lemon Cupcakes with Blackberry Buttercream Fact: I’m a little cupcake obsessed this Summer. Cannot get enough of them! Doesn’t matter if they’re Super Decadent Chocolate Cupcakes or of the Perfect “One Bowl” Vanilla variety – I WANT THEM ALL.
Question Tiiiiime: What’s your favorite cupcake flavor? Are you into crazy flavor combos? Or more of a classic chocolate/strawberry/vanilla kinda guy (or gal)?
Homemade cupcakes can seem like a lot of work to some people, but I’m here to tell you these lemon blackberry beauties are totally do-able in just over an hour, and virtually impossible to screw up. They’re also just downright FUN to make! Cupcake baking is one of my favorite ways to spend an afternoon or evening, and the workload is even easier (and a lot more FUN) if you have a friend joining in on the action. I baked 3 different cupcake recipes down the beach with my nieces, and it was a BLAST! I definitely think we have some budding bloggers in the fam 😉
This simple but lovely flavor combo was inspired by the late Summer wave of (very fresh and affordable) berries we have at our fingertips. Cheap and juicy berries… such a luxury! I ate 2 cartons standing over the sink, and decided halfway through the third to regain some self-control and make a vibrantly flavored (and colored) buttercream with what was left. Thank goodness that self-control kicked in! This buttercream is killer 😉

For the cupcakes:
  • 1 3/4 cups cake flour
  • 1 1/4 teaspoons baking powder
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1/2 cup sour cream (I used full fat)
  • 1/2 cup milk (I used whole)
  • 2 teaspoons vanilla extract
  • 2 large egg whites, at room temperature
  • 1 stick (4 ounces) unsalted butter, melted
  • 1 cup granulated sugar
  • *Zest of one lemon (about 2 teaspoons)
For the Blackberry Buttercream:
  • 1 cup blackberries
  • 2 tablespoons lemon juice
  • 2 sticks (8 ounces) unsalted butter, VERY soft
  • 1/2 teaspoon salt (do not SKIP!)
  • 4 cups confectioners sugar (more if needed), sifted
  1. Preheat oven to 350 degrees (F). Line a 12 mold muffin tin with paper liners; set aside.
  2. In a medium bowl combine flour, baking powder, baking soda, and salt; mix well to combine. Set aside.
  3. In a large measuring cup or bowl combine sour cream, milk, vanilla, and egg whites; mix well to combine. Set aside.
  4. In a small bowl combine sugar and lemon zest. Using your fingertips, rub the zest IN to the sugar, until fragrant and well combined.
  5. In a large bowl or stand mixer fitted with the paddle attachment beat melted butter and sugar on medium speed until well combined; about 2 minutes.
  6. Slowly add the flour mixture to the butter/sugar combination, beating until just combined. Add in sour cream/milk/egg combo and beat on low until *just combined. Over-mixing will result in a dryer/denser cake.
  7. Divide the cupcake batter evenly into the 12 molds, then place the pan in the oven. Bake for about 16 minutes, or until a toothpick inserted into the center of a cupcake comes out clean. Allow cupcakes to cool completely before topping with frosting.
  8. For the blackberry buttercream:
  9. Combine the blackberries and lemon juice in a small saucepan. Bring to a simmer over medium heat, and stir constantly until blackberries have become soft enough to mash effortlessly.; about 6-7 minutes It will look like blackberry jam. Once the mixture can coat a spoon (you will have about 1/4 cup of blackberry puree) remove from heat. Place a fine-mesh strainer over a small bowl and push the puree though, leaving any seeds/large chunks behind. Allow mixture to cool completely before using.
  10. When ready to make buttercream:
  11. Place soft butter in the body of a stand mixer fitted with the paddle attachment; beat butter on medium-speed until completely smooth, scraping down the sides when needed; about 2 minutes. Add in the blackberry puree and beat until completely combined, scraping down the sides of the bowl if needed. Add in the confectioners sugar, one cup at a time, on low speed. Once all of the sugar has been added, add in salt then increase speed to medium-high and beat for 2 full minutes. Ice cupcakes as desired.
  12. *Cupcakes can be made up to 6 hours ahead of time, but be sure to store in the fridge and bring to room temperature 30 minutes before serving.
You can find complete recipes of this Lemon Cupcakes with Blackberry Buttercream in bakerbynature.com
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