01 -
Preheat oven to 175°C. Lightly grease an 230 millilitre ovenproof ramekin with butter.
02 -
Combine chocolate chips and butter in a microwave-safe bowl. Microwave for 1 minute, then stir until fully melted and homogenous.
03 -
Add flour, powdered sugar, cocoa powder, milk, sea salt, and vanilla extract to the melted chocolate mixture. Gently mix just until incorporated, avoiding overmixing.
04 -
Pour batter into the prepared ramekin. Submerge hazelnut truffle in the center of the batter.
05 -
Bake for 20 minutes until the edges are set and the center remains soft. Remove from oven and let cool for 10 minutes.
06 -
Run a butter knife around the edge to loosen. Carefully invert onto a serving plate, dust with additional powdered sugar if desired, and serve warm.