Overnight Mac & Cheese
- 50 min
- Serves 6
- 9 ingredients
20 minutes to prep, 30 to cook. This Overnight Mac & Cheese lets you prep the creamy pasta a day ahead, then simply bake it for a golden, cheesy crust. A blend of Gruyère and white cheddar gives a rich, tangy flavor, while a buttery breadcrumb topping adds a satisfying crunch. Perfect for a comforting dinner with minimal effort on the day of serving.
Free. No account needed.
Method
Bring a large pot of salted water to a boil and cook the pasta until al dente, then drain.
In a large glass bowl, combine the heavy cream, grated Gruyère, grated white cheddar, ground nutmeg, and a generous grind of black pepper; stir until the cheese begins to melt.
Grind freshly ground black pepper into the cheese‑cream mixture.
Add the cooked pasta to the cheese‑cream mixture and toss to coat evenly.
Cover the bowl with plastic wrap and refrigerate overnight.
Preheat the oven to 350°F (350°F). Grease a baking dish with a little Kerrygold Pure Irish Butter.
In a separate bowl, mix the melted Kerrygold Pure Irish Butter with the fresh white breadcrumbs until the crumbs are lightly coated.
Transfer the chilled macaroni‑and‑cheese mixture to the prepared baking dish.
Sprinkle the buttered breadcrumb topping evenly over the surface.
Bake for about 30 minutes, or until the top is golden brown and the sauce is bubbling.
Tips while you cook
- Chill before baking
- Cover the cheese‑pasta mixture and refrigerate overnight before baking.
- Grease the baking dish
- Grease the dish with butter before adding the chilled mixture to prevent sticking.
- Even cheese coating
- Toss the cooked pasta with the cheese‑cream mixture before chilling for uniform coverage.
- Add topping just before bake
- Sprinkle the buttered breadcrumb topping over the mac and cheese right before baking for a crisp crust.
Notes from ReelsMeals, based on this recipe's ingredients, times and method. They are not the creator's instructions.
Made it?
Tap a star to rate it. Ratings help other cooks decide what to make next.
Rate this recipe

Watch Erin O'Brien make it. The video loads from Instagram when you tap.
Erin O'Brien made this.
The recipe comes from Erin O'Brien’s Instagram reel. ReelsMeals wrote it down from the caption and the voiceover. Check the original if something looks off, and for anything about allergens.
Are you Erin O'Brien and want this changed? Email [email protected].
Share or print it
Credit or embed it on your own site
More dinner recipes

Blue Apron Meal Kit Trio: French Onion Soup, Chinese Chicken Salad, and Butternut Squash Rosemary Gnocchi
Brooke Carson · 50 min

Mississippi Pot Roast
Brooke Carson · 8 hr 20 min

Shrimp Stir Fry
Vimarsh Patel · 20 min

Chickpea Pasta with Cauliflower Bolognese
Donal Skehan · 35 min
Saved hundreds of reels like this one? ReelsMeals brings your whole Instagram saved folder into one cookbook. See how
What cooks said
No comments yet. Cooked it? Be the first to say how it went.