INGREDIENTS
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For the cake
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cooking spray
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2-1/4 oz. (3/4 cup) natural unsweetened cocoa powder
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1-1/2 oz. (1/2 cup) Dutch-processed cocoa powder
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1-1/2 cups hot, strong brewed coffee
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1 cup mild honey, such as clover
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13-1/2 oz. (3 cups) unbleached all-purpose flour
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1-1/2 tsp. baking powder
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1-1/2 tsp. baking soda
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1 tsp. kosher salt
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6 oz. (3/4 cup) unsalted butter, softened
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3/4 cup vegetable oil
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1 cup packed dark brown sugar
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1 cup granulated sugar
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4 large eggs, at room temperature
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3/4 cup sour cream, at room temperature
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2 tsp. pure vanilla extract
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For the chocolate-honey ganache
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1 lb. semisweet chocolate (60% cacao), finely chopped
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2 cups heavy cream
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1/4 cup mild honey, such as clover
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2 oz. (4 Tbs.) cold unsalted butter, cut into 4 pieces
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3 Tbs. dark rum (optional)
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1 tsp. pure vanilla extract
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For the chocolate curls (optional)
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1 thick block semisweet chocolate