01 -
Preheat oven to 175°C and line a muffin tin with paper cupcake liners.
02 -
Cream the softened butter and sugar together in a large mixing bowl until light and fluffy using a stand mixer or hand mixer.
03 -
Add eggs one at a time, mixing thoroughly after each addition. Stir in the vanilla extract and milk until fully combined.
04 -
In a separate bowl, whisk together flour, baking powder, and salt. Gradually fold the dry mixture into the wet mixture until just combined. Avoid overmixing.
05 -
Puree fresh blackberries in a blender until smooth.
06 -
Gently swirl the blackberry puree into the batter, being careful not to overmix so the purple swirls remain distinct.
07 -
Fill cupcake liners two-thirds full with batter. Bake for 20–25 minutes or until a toothpick inserted into the center comes out clean.
08 -
Allow cupcakes to cool in the pan for a few minutes, then transfer to a wire rack to cool completely before serving.