– 1 cup all-purpose flour spooned & leveled (125 grams) – ¼ cup plus 2 tablespoons unsweetened natural cocoa powder (30 grams) – ¾ teaspoon baking powder – ½ teaspoon baking soda – ½ teaspoon salt – ½ cup packed light brown sugar (100 grams) – ½ cup granulated sugar (100 grams) – ⅓ cup canola or vegetable oil (80 ml) – ½ cup buttermilk (120 ml)
– 1 large egg – 1 teaspoon pure vanilla extract – ½ cup boiling water (120 ml) – 1 teaspoon instant espresso powder optional but recommended
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