INGREDIENTS
•
Cake
•
6 tablespoons (85 grams) unsalted butter, at room temperature
•
3/4 cup (145 grams) firmly packed dark brown sugar
•
2 tablespoons (25 grams) granulated sugar
•
1 large egg
•
1 large egg yolk
•
3/4 cup (175 ml) buttermilk (see Notes for other options)
•
1 teaspoon (5 ml) vanilla extract
•
1/2 cup (41 grams) Dutch cocoa powder
•
1 cup (125 grams) all-purpose flour
•
1/4 teaspoon baking soda
•
1/2 teaspoon baking powder
•
1/2 teaspoon table or fine sea salt
•
Frosting
•
2 ounces (55 grams) unsweetened chocolate, melted and cooled
•
1 1/2 cups (180 grams) powdered sugar (sifted if lumpy)
•
1/2 cup (4 ounces or 115 grams) unsalted butter, at room temperature
•
Pinch of fine sea salt (optional)
•
1 tablespoons cream or whole milk
•
1/2 teaspoon vanilla extract