INGREDIENTS
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1 1/2 cups all-purpose flour
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1/2 cup Dutch-process cocoa powder, plus more for dusting (optional)
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1/2 cup sugar
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1/2 cup malted milk powder
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1/4 teaspoon baking soda
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1/4 teaspoon salt
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1 teaspoon vanilla extract
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12 tablespoons unsalted butter, cut into 1/2-inch pieces, at room temperature
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4 ounces white chocolate, coarsely chopped
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2 tablespoons malted milk powder
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Pinch of salt
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1/2 teaspoon vanilla extract
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1/2 cup heavy cream