"This easy pumpkin sheet cake recipe is a blank canvas, just as amazing topped with marshmallows as it is with cream cheese frosting or buttercream...."
INGREDIENTS
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1/2 cup extra-virgin olive oil, plus more for pan
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2 1/2 cups all-purpose flour
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2 teaspoons ground cinnamon
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2 teaspoons ground ginger
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1 teaspoon baking soda
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1 teaspoon kosher salt
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1/2 teaspoon baking powder
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1 15-ounce can pumpkin purée
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3 large eggs, room temperature
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2 cups (packed) light brown sugar
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1/2 cup whole-milk Greek yogurt
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1 10-ounce bag marshmallows (not mini)