INGREDIENTS
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Vegetable oil
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1 1/2 cups all-purpose flour, plus more for dusting pan
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1/2 teaspoon baking soda
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1/2 teaspoon baking powder
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1/2 teaspoon cinnamon
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1/2 teaspoon ground cloves
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1/2 teaspoon fine salt
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1/4 teaspoon ground ginger
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1/4 teaspoon ground cardamom
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2 (2 1/2-ounce) jars sweet potato baby food (about 1/2 cup)
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1/3 cup buttermilk
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2 teaspoons vanilla extract
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8 tablespoons (1 stick) unsalted butter, softened
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1 cup sugar
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3 large eggs, at room temperature
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Confectioners' sugar, for dusting
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1 1/2 cups heavy whipping cream
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1 tablespoon confectioners' sugar
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1/3 cup thinly sliced (or chopped) crystallized ginger
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1/4 cup caramel sauce
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Ground cinnamon, for dusting, optional