INGREDIENTS
•
1/2 cup (41 grams) Dutch cocoa powder
•
1 cup (125 grams) all-purpose flour
•
1/4 tsp baking soda
•
1/2 tsp baking powder
•
1/2 tsp table or fine sea salt
•
6 tbsp (85 grams) unsalted butter, at room temperature
•
3/4 cup (145 grams) firmly packed dark brown sugar
•
2 tbsp (25 grams) granulated sugar
•
1 large egg
•
1 large egg yolk
•
3/4 cup (175 ml) buttermilk (or 3/4 cup milk with 1 tbsp lemon juice or vinegar mixed in)
•
1 tsp (5 ml) vanilla extract
•
2 oz (55 grams) unsweetened chocolate, melted and cooled
•
1 1/2 cups (180 grams) powdered sugar (sifted if lumpy)
•
1/2 cup (4 oz or 115 grams) unsalted butter, at room temperature
•
Pinch of fine sea salt
•
1 tbsp cream or whole milk
•
1/2 tsp vanilla extract