"A perfect anytime loaf cake with unexpected grapefruit flavor, made with oil so it keeps a long time and stays moist...."
INGREDIENTS
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Nonstick vegetable oil spray
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1 1/2 cups all-purpose flour
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2 teaspoons baking powder
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3/4 teaspoon kosher salt, plus more
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1 tablespoon finely grated grapefruit zest
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1 cup granulated sugar
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2 large eggs, room temperature
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1/3 cup vegetable oil
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1 teaspoon vanilla extract
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3/4 cup plus 1 tablespoon plain Greek yogurt
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8 tablespoons fresh grapefruit juice, divided
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1 tablespoon poppy seeds, plus more for sprinkling
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1/2 cup powdered sugar