This oven baked 3-ingredient chicken Wellington casserole is the kind of retro comfort food that earns a permanent spot in the family recipe box. It has that cozy, potluck-style charm with tender chicken, a creamy filling, and a buttery puff pastry top that bakes up beautifully golden. I love recipes like this for busy weeknights because they feel special without asking for a long grocery list, and it’s easy to see why a dish like this would have been a regular at so many bridge club tables.
Serve this casserole with something simple and fresh to balance the rich, creamy filling. A crisp green salad, steamed green beans, roasted broccoli, or glazed carrots all work really well, and if you’re feeding a bigger group, a fruit salad or light soup on the side makes it feel like a complete lunch or supper spread.
Oven Baked 3-Ingredient Chicken Wellington Casserole
Servings: 6
Ingredients
2 cups cooked chicken, chopped or shredded
1 can condensed cream of chicken soup
1 sheet frozen puff pastry, thawed
Directions
1. Preheat the oven to 400°F and lightly grease a medium baking dish or casserole dish.
2. In a mixing bowl, stir together the cooked chicken and condensed cream of chicken soup until evenly combined.
3. Spread the chicken mixture evenly into the prepared baking dish.
4. Lay the thawed puff pastry sheet over the top, trimming if needed so it fits the dish. Gently press the edges down along the rim.
5. Bake for 25 to 30 minutes, or until the pastry is puffed and deep golden brown and the filling is hot and bubbly around the edges.
6. Let the casserole rest for 5 to 10 minutes before scooping and serving.
Variations & Tips
Add vegetables: If you want to stretch the casserole a bit, stir in a handful of thawed frozen peas or mixed vegetables with the chicken and soup. It’s an easy way to make this feel a little more complete for dinner.
Use rotisserie chicken: This is my favorite shortcut when the day gets busy. Rotisserie chicken adds great flavor and makes the prep fast enough to pull together on a weeknight.
Keep the pastry cold: Puff pastry bakes best when it is still cool to the touch, so don’t leave it sitting out too long. If it softens too much while you assemble the casserole, pop the dish into the fridge for a few minutes before baking.
Make it feel more homemade: Even though the ingredient list is intentionally short, a little black pepper or a light brushing of egg wash on the pastry can improve the flavor and color if you have those extras on hand.
Watch the top near the end: Ovens can vary, and puff pastry can go from golden to too dark pretty quickly. If the top is browning before the filling is fully heated through, loosely tent it with foil for the last few minutes.