Step 1: Preheat the Oven
Preheat your oven to 425°F (220°C). Grease or line a 12-cup muffin tin with cupcake liners.
Step 2: Melt the Chocolate and Butter
In a double boiler or microwave-safe bowl, melt the chocolate chips and butter together. Stir until smooth and set aside to cool slightly.
Step 3: Whisk the Eggs and Sugar
In a mixing bowl, whisk together the eggs, egg yolks, and sugar until light and fluffy.
Step 4: Combine Wet and Dry Ingredients
Gently fold the melted chocolate mixture into the egg mixture. Sift in the flour and salt, and mix until just combined. Stir in the vanilla extract.
Step 5: Assemble the Cupcakes
Spoon half the batter into the prepared muffin tin. Place one fresh raspberry in the center of each cupcake, then cover with the remaining batter.
Step 6: Bake
Bake in the preheated oven for 10-12 minutes, or until the edges are set and the centers are slightly jiggly.
Step 7: Cool and Serve
Allow the cupcakes to cool in the tin for 5 minutes before removing them. Dust with powdered sugar and top with whipped cream or vanilla ice cream, if desired. Garnish with extra raspberries.