Ingredients:
- 2 ounces semisweet chocolate baking bar, finely chopped
- 1/4 cup heavy cream
- 1 cup cake flour
- 1 1/2 teaspoons unsweetened cocoa, plus more for ramekins
- 1/4 teaspoon baking soda
- 1/4 teaspoon salt
- 1/2 cup salted butter, melted, plus more for ramekins
- 1/2 cup granulated sugar
- 6 tablespoons buttermilk
- 1 1/2 teaspoons red liquid food coloring
- 1/2 teaspoon vanilla extract
- 1/2 teaspoon apple cider vinegar
- 1 large egg yolk