Nobody cheers when you announce leftovers for dinner. But nobody complains about chili dogs, sloppy joes, or a pan of baked ziti, either, and those can all start as the same pot of food.
That’s the idea behind cook once, eat twice. You make a big batch of one basic dish, serve it the first night, then turn what’s left into a different meal later in the week. You cook one time, wash one set of pots, and get two or three dinners out of it.
It’s one of the easiest ways to save time and money, and once you know which foods work, it takes almost no extra planning.
How cook once, eat twice works
Make a base. Pick a dish that’s simple and easy to change, like spaghetti sauce, chili, a roast chicken, or a pot of rice. Make about twice as much as you need for one dinner.
Serve it the first night. Eat it the usual way: spaghetti, a bowl of chili, roast chicken with potatoes.
Change it the second time. Use the leftovers as an ingredient in something new. Add a new shape, a new topping, or a new flavor, so it feels like a different meal.
Freeze what you won’t use soon. If the second meal is more than a few days away, freeze the extra the day you cook it.
North Dakota State University Extension has a name for this: “planned-overs,” or leftovers you make on purpose.
The trick is the change. The same spaghetti and sauce two nights in a row is leftovers. Spaghetti on Monday and baked ziti on Thursday is a plan.
15 foods that make two (or three) meals
1. Spaghetti sauce
A big pot of meat sauce is the classic cook-once base. Make a double batch and you’ve got the start of several dinners.
First night: Spaghetti with meat sauce
Then turn it into:
- Baked ziti or lasagna
- Sloppy joes (stir in a little ketchup, mustard, and brown sugar)
- Stuffed peppers with rice
- Pizza sauce for homemade pizza or French bread pizza
- Meatball subs, if you made meatballs in the sauce
2. Chili
Chili gets better the second day, and it works in more meals than you might think.
First night: Bowls of chili with cornbread
Then turn it into:
- Chili-topped baked potatoes
- Chili dogs or chili cheese fries
- Chili mac (stir it into cooked elbow macaroni with cheese)
- Frito pie or taco salad
- Chili-stuffed sweet potatoes
3. Roast chicken
One whole chicken can feed a family twice, and the bones make a third meal. A store-bought rotisserie chicken works the same way.
First night: Roast chicken with potatoes and a vegetable
Then turn it into:
- Chicken tacos, quesadillas, or enchiladas
- Chicken salad sandwiches
- Chicken and rice casserole
- Chicken pot pie
- Chicken noodle soup, with broth made from the bones
4. Pot roast
A chuck roast in the slow cooker on Sunday is the start of an easy week. Chuck is one of the cheaper beef cuts, and slow cooking makes it fall-apart tender.
First night: Pot roast with carrots, potatoes, and gravy
Then turn it into:
- Hot roast beef sandwiches with gravy
- Beef and vegetable soup
- Beef hash with potatoes and onions
- Shredded beef tacos or burritos
- Beef ragu over pasta (shred the beef into tomato sauce and simmer)
5. Pulled pork
A pork shoulder is one of the cheapest cuts per pound, and it makes a lot.
First night: Pulled pork sandwiches with coleslaw
Then turn it into:
- Pork fried rice
- Pulled pork nachos or quesadillas
- Barbecue pork baked potatoes
- Pork carnitas tacos (crisp the meat in a hot skillet first)
6. Taco meat
Brown 2 pounds of ground beef or turkey instead of 1, season it all, and use it two ways.
First night: Tacos
Then turn it into:
- Taco salad
- Nachos
- Taco casserole or taco pasta
- Stuffed peppers
- Burrito bowls with rice and beans
- Taco soup
Don’t forget the fixings. Leftover shredded lettuce, cheese, tomatoes, salsa, and sour cream go right into the taco salad or on top of the nachos, so nothing is wasted.
7. Baked ham
A holiday ham, or a small one on sale, keeps giving all week.
First night: Baked ham with potatoes
Then turn it into:
- Ham and cheese scalloped potatoes
- Ham fried rice
- Split pea or bean soup with the ham bone
- Ham and egg breakfast casserole
8. Turkey
Don’t save turkey for Thanksgiving. A whole turkey or a turkey breast often goes on sale, and one bird can cover several dinners.
First night: Roast turkey with mashed potatoes and gravy
Then turn it into:
- Hot turkey sandwiches with gravy
- Turkey pot pie
- Turkey tetrazzini or turkey noodle casserole
- Turkey and wild rice soup, with broth from the carcass
- Turkey enchiladas
9. Meatballs
Make a big batch, bake them all, and freeze what you don’t use.
First night: Spaghetti and meatballs
Then turn it into:
- Meatball subs
- Swedish meatballs over noodles
- Sweet-and-sour meatballs with rice
- Meatball soup
10. Rice
Cook a big pot once and use it all week. Cold, day-old rice actually makes better fried rice than fresh.
First night: A side of rice with stir fry or chicken
Then turn it into:
- Fried rice with eggs and whatever vegetables you have
- Rice and bean burritos
- Stuffed peppers
- Chicken and rice soup
11. Baked or mashed potatoes
Bake a whole sheet pan or mash a big pot at once. Cooked potatoes keep in the refrigerator for a few days.
First night: Baked potato bar, or mashed potatoes with roast or meatloaf
Then turn it into:
- Potato cakes (mix cold mashed potatoes with an egg and a little flour, then fry until golden)
- Shepherd’s pie or cottage pie, with mashed potatoes on top
- Breakfast hash with eggs
- Potato soup
- Twice-baked potatoes
- Cheesy potato casserole
12. Cream of broccoli soup
A creamy soup can do double duty as a sauce. Leave a little of the soup thicker, or simmer it down, and it coats pasta like an Alfredo.
First night: Bowls of cream of broccoli soup with bread
Then turn it into:
- Broccoli Alfredo-style pasta (toss the thick soup with hot pasta and Parmesan)
- Chicken and broccoli pasta bake
- Broccoli and cheese rice casserole
- A sauce for baked potatoes
The same trick works with cream of chicken, cream of mushroom, and cheese soups.
13. Stuffed peppers
Make a full pan of stuffed peppers and turn the extras into soup. Chop the leftover peppers and filling, add a can of diced tomatoes and some broth, and simmer.
First night: Stuffed peppers with beef, rice, and tomato sauce
Then turn it into:
- Stuffed pepper soup
- Stuffed pepper casserole (chop everything and bake it under cheese)
- Burrito bowls over extra rice
14. Roasted vegetables
Roast two sheet pans of vegetables instead of one. Carrots, potatoes, peppers, onions, squash, broccoli, and Brussels sprouts all work.
First night: Roasted vegetables as a side with chicken or pork
Then turn it into:
- A frittata or breakfast casserole
- Vegetable quesadillas
- Pasta tossed with olive oil and Parmesan
- Pureed vegetable soup
- Grain bowls with rice and a fried egg
15. Salmon or other fish
Bake an extra fillet or two. Cooked fish is best used within a day or two.
First night: Baked salmon with rice and a vegetable
Then turn it into:
- Salmon cakes (flake the fish, mix with an egg and bread crumbs, then pan-fry)
- Fish tacos with slaw
- Salmon and pasta salad
- Fish chowder
Good to know
Cook once, eat twice works best when the second meal changes the shape or the flavor. Turn a soupy dish into a baked one or a sauce, a plated dinner into a sandwich, or a mild dish into a spicy one, and it won’t feel like leftovers.
The leftover catch-alls
Some dinners will take almost any leftover: fried rice, quesadillas, frittatas, omelets, pot pie, burritos, soup, and pasta bakes. When you have a little of this and a little of that, one of these will use it all up.
More leftover makeovers
Here are more everyday leftovers and what they can become:
| Leftover | Turn it into |
|---|---|
| Grilled or baked chicken breasts | Chicken Caesar salad, chicken wraps, or chicken Alfredo |
| A pot of pinto or black beans | Refried beans, bean burritos, bean soup, or rice and beans |
| Beef stew | Pot pie with a biscuit or pie crust topping |
| Pork loin roast | Pork sandwiches, pork fried rice, or pork and noodle stir fry |
| Brisket | Brisket sandwiches, brisket tacos, or brisket hash |
| Fajita meat and peppers | Quesadillas, rice bowls, or fajita pasta |
| Hamburgers | Crumbled into chili, spaghetti sauce, or a cheeseburger casserole |
| Sausage | Sausage and peppers pasta, breakfast casserole, or sausage and bean soup |
| Meatloaf | Meatloaf sandwiches, or crumbled into spaghetti sauce |
| Pork chops | Pork fried rice, pork tacos, or chopped into pasta sauce |
| Steak | Steak fajitas, steak salad, or steak and eggs |
| Corned beef | Corned beef hash or Reuben sandwiches |
| Sloppy joes | Sloppy joe casserole or sloppy joe baked potatoes |
| Cooked pasta | Pasta bake, pasta frittata, or pasta salad |
| Mac and cheese | Baked with ham or pulled pork stirred in |
| Cooked vegetables | Soup, frittata, quesadillas, or pot pie |
| Stale bread | Bread pudding, French toast casserole, croutons, or bread crumbs |
| Pancakes or waffles | Freeze them and toast them on a school morning |
| Holiday stuffing | Stuffing-topped chicken casserole |
| Cornbread | Cornbread dressing, or crumbled over chili |
How to plan it into your week
Put the base meal early in the week and the second meal two or three days later. That keeps the leftovers well within safe storage times and gives everyone a break from the flavor in between.
Here’s what a cook once, eat twice week can look like:
| Day | Dinner | Cook once, eat twice |
|---|---|---|
| Sunday | Roast chicken with potatoes | Roast extra; save the bones |
| Monday | Spaghetti with meat sauce | Make a double batch of sauce |
| Tuesday | Chicken quesadillas | Uses Sunday’s chicken |
| Wednesday | Chicken noodle soup | Broth from Sunday’s bones |
| Thursday | Baked ziti | Uses Monday’s sauce |
| Friday | Leftovers or pizza night | French bread pizza with the last of the sauce |
| Saturday | Flexible night | Breakfast for dinner |
Two big cooking nights, five dinners. If you’re new to meal planning, our guide on how to meal plan walks you through the rest, and meal planning on a budget shows how leftovers fit into a tighter grocery budget.
Cook once, freeze twice
Sometimes you don’t want the same flavor twice in one week. That’s when the freezer comes in.
Make a double batch of chili, soup, sauce, or a casserole, serve half, and freeze the other half for a busy night next month. Over a few weeks, you’ll build a freezer full of dinners that only need to thaw and heat.
Our Freezer Meals library has hundreds of make-ahead dinners to get you started, including soups and chili and casseroles and pasta bakes. Many of them start with cooked meat, so they’re a natural home for leftover chicken, beef, or ham.
Cook meat ahead and freeze it
You don’t need a whole meal to cook once and eat twice. Cook a big batch of plain meat, freeze it in meal-size portions, and half the work of future dinners is already done.
- Shredded chicken: Cook several pounds of chicken breasts or thighs in the slow cooker or Instant Pot, shred it, and freeze it in 2-cup portions for tacos, enchiladas, soups, and casseroles.
- Ground beef crumbles: Brown 3 to 5 pounds of ground beef or turkey with onions, drain it, cool it, and freeze it flat in 1-pound bags for chili, sloppy joes, spaghetti sauce, and taco night.
- Diced ham: Cut leftover ham into cubes and freeze it for fried rice, scalloped potatoes, soups, and breakfast casseroles.
- Shredded beef or pork: Freeze leftover pot roast or pulled pork with a little of its cooking liquid so it stays moist.
Label each bag with what it is, how much is in it, and the date. Thaw it in the refrigerator overnight, and dinner comes together in minutes.
Not sure what to make with it? The Meal Planner can build a whole week around the cooked meat you have: try cooked chicken, ham, cooked beef or turkey.
Freezer tip
Freeze soups, chili, and sauces flat in freezer bags. Press out the air, label the bag with the name and date, and lay it flat until it’s frozen. Flat bags stack neatly and thaw faster.
Leftover safety rules
Leftovers only save money if they’re safe to eat. These rules come from the U.S. Department of Agriculture’s Food Safety and Inspection Service:
- Refrigerate within two hours. Put leftovers away within two hours of cooking, or within one hour if it’s hotter than 90°F, such as at a picnic.
- Cool it fast. Divide big batches of soup, chili, or sauce into smaller, shallow containers so they cool quickly in the refrigerator.
- Eat within three to four days. Refrigerated leftovers should be eaten within three to four days. If you won’t get to them by then, freeze them.
- Freeze for best quality within three to four months. Frozen food stays safe, but it slowly loses flavor and texture.
- Thaw in the refrigerator, cold water, or the microwave. Never thaw on the counter.
- Reheat to 165°F. Bring sauces, soups, and gravies to a rolling boil, and stir food in the microwave so it heats evenly.
Label every container with what’s in it and the date you cooked it. Clear containers help too. You’re more likely to eat what you can see.
Let the Meal Planner use up your leftovers
Our free Meal Planner has a “Use up leftovers” plan and a leftovers filter. Tell it you have leftover chicken, turkey, ham, or beef, and it builds a week of dinners that use it up, with a shopping list for everything else.
Frequently asked questions
What does cook once, eat twice mean? It means cooking a big batch of one dish, serving it once, and turning the leftovers into a different meal later in the week. You get two dinners from one round of cooking.
What foods are best for cook once, eat twice? Spaghetti sauce, chili, roast chicken, pot roast, pulled pork, taco meat, ham, turkey, meatballs, rice, baked or mashed potatoes, creamy soups, stuffed peppers, roasted vegetables, and fish all work well. They’re easy to make in big batches and easy to change into something new.
How long do leftovers last in the refrigerator? Three to four days, according to the USDA. Freeze anything you won’t eat in that time.
Can I freeze leftovers? Yes. Most cooked meats, soups, chili, sauces, and casseroles freeze well. For best quality, use them within three to four months, the USDA says.
How do I keep my family from getting tired of leftovers? Change the meal the second time. Turn spaghetti sauce into baked ziti, chili into chili dogs, or roast chicken into quesadillas. Wait a couple of days between the first and second meal, or freeze the extra for later.
Is it safe to reheat leftovers more than once? It’s best to reheat only what you’ll eat. Every trip in and out of the refrigerator gives bacteria another chance to grow, so take out one portion at a time and heat it to 165°F.
Does cooking once and eating twice really save money? Yes. Big batches and bigger packages usually cost less per serving, you use more of what you buy, and you’re less likely to order takeout on a busy night.
