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Prepare the pan
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Preheat oven to 350°F (175°C)
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Grease a 9×13 inch baking dish
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Arrange the rolls
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Unroll the crescent dough and press into the pan, sealing seams to form a base.
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Make the orange filling
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In a bowl, mix:
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granulated sugar + orange zest + vanilla + orange juice
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Pour this mixture evenly over the dough.
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Add butter
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Drizzle melted butter over the top.
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Bake
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Bake for 20–25 minutes, until the top is golden and the dough is cooked through.
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Make the glaze
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Whisk powdered sugar, orange juice, and vanilla until smooth.
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Adjust thickness by adding more orange juice (thinner) or more powdered sugar (thicker).
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Finish
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Drizzle the glaze over the warm casserole.
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Let cool for 5–10 minutes before slicing.