This casserole takes the spirit of a New Orleans king cake and tucks it into an easy, weekend-friendly bake. Instead of braiding dough, you’ll scatter cinnamon roll pieces into a glass baking dish and pour one sweet, custard-like blend over the top—eggs, whole milk, heavy cream, vanilla, cinnamon, and brown sugar.
The result lands somewhere between a cinnamon roll, bread pudding, and French toast bake: deeply comforting, wildly satisfying, and simple enough for a lazy Sunday brunch or a festive Mardi Gras breakfast.
Glass casserole dish filled with cut cinnamon rolls before baking
Glass casserole dish filled with cut cinnamon rolls before baking
Serve this warm, straight from the oven, with the icing drizzled generously over the top so it melts into the crevices. A bowl of fresh berries or citrus segments helps balance the richness, and a pot of hot coffee or a strong black tea is a natural pairing.
For a more indulgent brunch spread, you can add scrambled eggs and crisp bacon or sausage on the side so this sweet casserole can play the role of dessert-like centerpiece.
Sweet Blend King Cake Cinnamon Roll Casserole
Servings: 8
Ingredients
2 (12–13 oz) cans refrigerated cinnamon roll dough, with icing packets
3 large eggs
1 cup whole milk
1/2 cup heavy cream
1/3 cup packed light or dark brown sugar
2 teaspoons pure vanilla extract
1 1/2 teaspoons ground cinnamon
1/4 teaspoon fine sea salt
2 tablespoons unsalted butter, softened, for greasing the dish
Optional: 2–3 tablespoons colorful sanding sugar or sprinkles (purple, green, and gold for a king cake nod)
Directions
Preheat your oven to 350°F (175°C). Generously butter a 9×13-inch glass casserole dish, making sure to coat the bottom and sides so the cinnamon rolls don’t stick.
Butter being spread inside a glass casserole dish
Butter being spread inside a glass casserole dish
Open the cans of refrigerated cinnamon rolls and set the icing packets aside for later. Cut each cinnamon roll into 4–6 bite-sized pieces and scatter them evenly in the prepared glass baking dish.
In a medium mixing bowl, whisk the eggs until the yolks and whites are fully combined. Add the whole milk, heavy cream, brown sugar, vanilla extract, ground cinnamon, and salt. Whisk until the brown sugar is dissolved and the mixture looks smooth and evenly speckled with cinnamon. This is your one sweet blend.
Custard mixture being whisked in a bowl with cinnamon speckles
Custard mixture being whisked in a bowl with cinnamon speckles
Slowly pour this sweet blend over the cinnamon roll pieces in the glass casserole dish, making sure to cover all the pieces so they soak up the custard. Gently press down any pieces that sit too high so everything is lightly moistened.
Let the dish rest on the counter for 10–15 minutes to allow the cinnamon roll pieces to start absorbing the sweet mixture. This short soak helps the casserole bake up custardy rather than dry.
Place the dish on the center rack of the preheated oven and bake for 30–40 minutes, or until the top is puffed and golden brown and the custard is set in the center. A knife inserted in the middle should come out mostly clean, with no liquid custard clinging to it.
Golden baked cinnamon roll casserole fresh from the oven
Golden baked cinnamon roll casserole fresh from the oven
Remove the casserole from the oven and let it cool for about 10 minutes. While it rests, knead the icing packets briefly with your hands to soften them, then snip the corners and drizzle the icing generously over the warm casserole. If using, sprinkle with purple, green, and gold sanding sugar for a king cake effect.
Serve warm, scooping the casserole into bowls or onto plates so everyone gets a mix of soft, custardy center and golden edges. Store any leftovers covered in the refrigerator for up to 3 days and reheat gently in a low oven or microwave before serving.
Variations & Tips
For a stronger king cake vibe, tuck a few tablespoons of cream cheese in small dollops among the cinnamon roll pieces before pouring on the sweet blend; it will bake into pockets of tangy richness. You can also add 1/2 cup of chopped pecans for a bit of crunch, or scatter in 1/3 cup of golden raisins for a nod to classic bread pudding.
Served portion of cinnamon roll casserole with icing and colorful sugar
Served portion of cinnamon roll casserole with icing and colorful sugar
If you prefer a slightly lighter texture, replace the heavy cream with additional whole milk and reduce the brown sugar to 1/4 cup. For a make-ahead version, assemble the dish the night before, cover tightly, and refrigerate; in the morning, let it sit at room temperature for 20–30 minutes while the oven preheats, then bake as directed, adding a few extra minutes if needed.
A pinch of nutmeg or cardamom in the sweet blend adds subtle warmth, and if you like a boozy twist, whisk 1–2 tablespoons of rum or bourbon into the custard. Just keep the core method the same: scatter cinnamon roll pieces in a glass dish, pour over one well-mixed sweet blend, and bake until puffed and set.
