INGREDIENTS
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For the Cake
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1 1/3 cups (167 grams) all-purpose flour
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1 2/3 cups (333 grams) sugar
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1/2 cup (60 grams) Dutch process unsweetened cocoa powder (I used Valrhona)
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1 1/2 teaspoons baking soda
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3/4 teaspoon salt
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2/3 cup (160 ml) vegetable oil
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2/3 cup (150 grams) sour cream
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1 cup (240 grams) water
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1 tablespoon distilled white vinegar
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1 teaspoon vanilla extract
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1 extra large egg
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For the Frosting
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3 tablespoons (22 grams) unsweetened cocoa powder (I used Valrhona)
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1 cup (125 grams) malted milk powder
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Pinch of salt
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1/4 cup boiling water
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1 cup (2 sticks/226 grams) unsalted butter, at room temperature
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1 cup (125 grams) powdered sugar
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6 ounces (170 grams) semi-sweet chocolate, melted and cooled (I used Callebaut)
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1-2 tablespoons (15-30 ml) heavy cream