Chocolate Cupcakes:

1/2 cup (50 grams) Dutch-processed cocoa powder

1 cup (240 ml) boiling hot water

1 1/3 cups (175 grams) all purpose flour

2 teaspoons baking powder

1/4 teaspoon salt

1/2 cup (113 grams) unsalted butter, room temperature

1 cup (200 grams) granulated white sugar

2 large eggs

2 teaspoons pure vanilla extract

Chocolate Fudge Frosting:

4 ounces (120 grams) unsweetened chocolate, coarsely chopped

2/3 cup (150 grams) unsalted butter, room temperature

1 1/3 cups (160 grams) confectioners (powdered or icing) sugar, sifted

1 1/2 teaspoons pure vanilla extract