INGREDIENTS
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For the Cake
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6oz. unsalted butter, more for pans
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13.5 oz (3 c.) unbleached all-purpose flour, more for pans
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3/4 c. canola oil
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4.5 oz bittersweet chocolate finely chopped
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3 c. granulated sugar
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2 1/4 oz. (3/4 c.) natural unsweetened cocoa powder
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3 large eggs, at room temperature
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3/4 c. buttermilk, at room temperature
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2 T. pure vanilla extract
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2 1/2 tsp baking soda
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1/2 t. kosher salt
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For the Frosting
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2 1/2 c. heavy cream
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3 oz. (6 T.) unsalted butter
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1 vanilla bean, split lengthwise and seeds scraped out
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6 oz. bittersweet chocolate, finely chopped
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2 c. granulated sugar
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6 oz. (2 c. ) natural unsweetened cocoa powder; more for dusting later
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1/2 c. Golden Syrup
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1/4 t. kosher salt
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Marshmallows
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vegetable oil for brushing
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4 envelopes unflavored gelatin
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3 c. granulated sugar
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1 1/4 c. light corn syrup
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1/4 t. salt
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1 1/2 c. water
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2 t. pure vanilla extract
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1 1/2 c. confectioners’ sugar