This easy overnight cinnamon roll breakfast casserole is the ultimate shortcut to a special breakfast. Prep it in 10 minutes the night before, then just pop it in the oven in the morning for a soft, pull-apart casserole with a caramelized, creamy bottom.
Do not skip the overnight rest; it is crucial for the texture. Use room temperature eggs to prevent the custard from becoming lumpy. If adding nuts, sprinkle them on top just before baking to keep them crunchy. For a dairy-free version, try full-fat canned coconut cream and dairy-free milk, but the texture will differ.
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