1 ½cupsall-purpose flour, spooned and leveled190 g
1tspbaking powder
¼tspbaking soda
¼tspsalt
½cupsalted butter, softened115 g
¾cupgranulated sugar150 g
2large eggs, room temperature
2tsppure vanilla extract
½cupmilk, room temperature120 g
¼cupsour cream, room temperature60 g
Berry Buttercream:
1cuppsalted butter, softened225 g
3 ½cupspowdered sugar, sifted420 g
¼cupmixed berry puree (from ¾ cup fresh or frozen berries, blended and strained)60 g
¼tspstrawberry emulsion
1tspvanilla extract
⅛salt
1-2Tbspheavy creamoptional, for consistency
Instructions
For the Vanilla Cupcakes:
Preheat oven to 350°F (175°C). Line a 12-cup muffin tin with cupcake liners.
In a medium bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
In a large bowl, beat softened butter and granulated sugar with an electric mixer on medium speed until light and fluffy, about 2–3 minutes.
Add eggs one at a time, beating well after each addition. Mix in vanilla extract.
With the mixer on low speed, add half the dry ingredients, followed by the milk and sour cream, then the remaining dry ingredients. Mix until just combined—do not overmix.
Divide batter evenly among the cupcake liners, filling each about ¾ full. Bake for 18–20 minutes, or until a toothpick inserted in the center comes out clean.
Cool cupcakes in the tin for 5 minutes, then transfer to a wire rack to cool completely before frosting.
For the Berry Buttercream:
Blend ¾ cup fresh or thawed frozen berries until smooth. Strain through a fine mesh sieve to remove seeds, measuring out ¼ cup puree.
In a large bowl, beat softened butter on medium speed until creamy, about 1–2 minutes.
Gradually add sifted powdered sugar, 1 cup at a time, mixing on low until combined.
Add berry puree, strawberry emulsion, vanilla extract, and a pinch of salt. Beat on high speed for 2–3 minutes until light and fluffy.
If needed, adjust consistency: add 1–2 tbsp heavy cream for a softer frosting or more powdered sugar (¼ cup at a time) if too thin.
Transfer buttercream to a piping bag fitted with a Wilton 1M tip. Pipe swirls onto cooled cupcakes, starting from the outside and spiraling inward.
Notes
Room Temperature Ingredients: Use room-temperature butter, eggs, milk, and sour cream for a smooth batter and frosting.
Berry Puree: Fresh or frozen (thawed) berries work well. Mix raspberries, strawberries, or blackberries, or use one type for a specific flavor.
Strawberry Emulsion: The ¼ tsp of strawberry emulsion boosts berry flavor without adding liquid. Available at baking supply stores or online.
Piping Tip: The Wilton 1M tip creates professional rosette swirls. Practice on parchment if new to piping.
Storage: Store frosted cupcakes in an airtight container at room temperature for 1 day or in the fridge for up to 3 days. Bring to room temperature before serving.
Freezing: Freeze unfrosted cupcakes wrapped in plastic wrap in a freezer-safe bag for up to 3 months. Thaw at room temperature before frosting. Buttercream can be frozen for 3 months; thaw in the fridge and re-whip.