Prepare the Raspberry Centers
Mash raspberries gently. Melt chocolate chips with heavy cream until smooth, then mix with raspberries. Spoon into 6 small mounds on parchment paper and freeze for at least 30 minutes.
Preheat & Prepare Pan
Preheat oven to 425°F (220°C). Grease 6 muffin cups with butter and dust lightly with flour or cocoa powder.
Melt Chocolate & Butter
Microwave chopped dark chocolate and butter in intervals, stirring until smooth. Let cool slightly.
Whisk Eggs & Sugar
Whisk eggs, egg yolks, and sugar until thick and pale.
Combine Batter
Fold melted chocolate into egg mixture. Add flour and salt, mixing gently until just combined.
Assemble Cupcakes
Fill muffin cups halfway with batter. Add frozen raspberry centers, then cover with more batter.
Bake
Bake Raspberry Chocolate Lava Cupcakes for 12–14 minutes until edges are set and centers remain slightly soft.
Serve
Let rest for 1–2 minutes, then invert onto a plate. Dust with powdered sugar and garnish with raspberries. Serve warm.