Preheat oven to 350°F. Line a 9×5 or 8×4-inch loaf pan with parchment paper.

Melt together chocolate and butter in the microwave in 1 minute with frequent stirring until completely melted, smooth and glossy.

Beat egg with sugar, vanilla and salt in a large bowl with a electric mixer for several minutes until pale, thick and fluffy. Beat in warm chocolate mixture until evenly blended. Sieve in flour and fold it in until well incorporated and smooth.

Spread batter into prepared pan and sprinkle chocolate chips on top. Bake for 15-20 minutes until a skewer inserted into the center comes out with a few moist crumbs.

Allow the brownies to cool completely before slicing and serving. Enjoy!