Ingredients:
- 432g chocolate cake mix
- 113g unsalted butter
- 3 large eggs
- 1 egg yolk
- 240ml whole milk
- 5ml vanilla extract
- 2.5g fine sea salt
- 115g semi-sweet chocolate chips
- 80ml heavy cream
- 14g unsalted butter
- 0.5g salt
Instructions:
- Preheat oven to 350°F (175°C). Grease a 9-inch round or square cake pan and line the bottom with parchment paper.
- Melt 113g unsalted butter in a saucepan over medium heat, whisking constantly until it foams and turns a deep amber color with a nutty aroma. Remove from heat immediately and cool slightly.
- In a large bowl, combine the chocolate cake mix and 2.5g fine sea salt.
- Add the browned butter, milk, vanilla extract, 3 eggs, and 1 egg yolk to the dry ingredients.
- Using an electric mixer on medium-high, whip the batter for 3 minutes until smooth, glossy, and slightly increased in volume.
- Pour the batter into the prepared pan and bake for 45–50 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
- Prepare the glaze by placing 115g semi-sweet chocolate chips in a heat-proof bowl. Heat 80ml heavy cream in a saucepan until it just begins to simmer.
- Pour the hot cream over the chocolate and let sit for 2 minutes, then whisk until velvety and smooth.
- Stir in 14g room temperature butter and 0.5g salt until the glaze is reflective and smooth.
- Drizzle the chocolate glaze generously over the cooled cake.