Creating these Dark Chocolate Blackberry Cupcakes is a straightforward process. To help you succeed, here’s a step-by-step guide:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Line a cupcake tin with paper liners.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, cocoa powder, sugar, baking powder, baking soda, and salt until well combined.
3. Combine Wet Ingredients: In another bowl, beat the eggs, buttermilk, vegetable oil, and vanilla extract together until smooth.
4. Mix Ingredients Together: Gradually add the wet mixture to the dry ingredients, stirring until just combined.
5. Add Boiling Water: Carefully mix in the boiling water until the batter is smooth and well blended.
6. Gently Fold in Blackberries: Gently fold the fresh blackberries into the batter, being careful not to break them apart too much.
7. Fill Cupcake Liners: Pour the batter into the prepared cupcake liners, filling each about 2/3 of the way full.
8. Bake: Place the tray in the oven and bake for 18-20 minutes or until a toothpick inserted into the center comes out clean.
9. Cool: Remove the cupcakes from the oven and allow them to cool in the pan for about 10-15 minutes before transferring them to wire racks to cool completely.
10. Frost and Garnish: If desired, top with chocolate frosting and garnish with additional fresh blackberries before serving.

Following these steps will yield perfectly baked cupcakes that are both impressive and delicious.