01 -
Preheat oven to 425°F (220°C). Grease and flour 6 muffin cups in a muffin tin.
02 -
In a microwave-safe bowl, melt butter and semi-sweet chocolate together, stirring every 30 seconds until smooth.
03 -
Whisk together flour, cocoa powder, baking powder, and salt in a separate bowl.
04 -
Beat eggs, egg yolks, and granulated sugar until thick and pale (3-4 minutes). Stir in melted chocolate mixture and vanilla extract.
05 -
Fold dry ingredients into wet mixture. Fill muffin cups halfway with batter, add raspberry preserves to center, then cover with remaining batter.
06 -
Bake 12-14 minutes until edges are set but center is slightly jiggly. Cool 2 minutes, remove from pan, dust with powdered sugar, and serve immediately while warm.