1-First Step: Preheat your oven to 425°F (220°C). Butter and lightly flour four 6-ounce ramekins or muffin tins. Place them on a baking sheet for easy transfer. Chop the chocolate and cube the butter for quick melting. Have eggs at room temperature to blend smoothly.

2-Second Step: Combine chopped bittersweet chocolate and cubed butter in a microwave-safe bowl. Microwave in 20-second bursts, stirring after each, until smooth (about 1 minute total). Or use a double boiler on stovetop over simmering water, stirring constantly for 2-3 minutes. Set aside to cool slightly. This creates the molten heart of your gooey molten chocolate cake.

3-Third Step: In a medium bowl, whisk whole eggs, egg yolks, and granulated sugar vigorously by hand or with an electric mixer for 3-5 minutes until pale, thick, and ribbony. This step incorporates air for the cake’s rise. It takes effort but ensures the perfect lava flow.

4-Fourth Step: Gently fold the cooled chocolate mixture into the egg mixture with a spatula. Add vanilla extract, flour, and salt. Mix until just combined, avoiding overmixing to keep the batter light. The batter should be thick and glossy, like brownie batter.

5-Fifth Step: Divide batter evenly among prepared ramekins, filling about 3/4 full. Bake on the middle rack for 11-13 minutes. Edges set but centers jiggle slightly. Overbaking ruins the molten center, so time it carefully. Rotate the sheet halfway if your oven heats unevenly.

6-Final Step: Let cakes cool in ramekins for 1 minute. Run a knife around edges and invert onto plates. Dust with powdered sugar. Serve immediately with vanilla ice cream or berries for contrast. The chocolate pours out warm and inviting, perfect for sharing at potlucks. Total time keeps it ideal for busy schedules.