I poured half a bottle of perfectly good red down the sink on a Sunday morning, which I'd been doing after dinner parties for years. Then, eleven days later, I stood in the supermarket buying a $6 bottle of something labeled "cooking wine", which is thin, salted, and worse than anything I'd ever poured away, because a recipe called for half a cup.

I did the same thing with stock constantly. Open a carton for half a cup of broth, put the rest in the fridge with good intentions, find it two weeks later wearing a grey coat.

The fix is an ice cube tray. That's the whole idea, and I resisted it for an embarrassingly long time because it sounded like the kind of advice that doesn't survive contact with an actual kitchen. It does. I haven't bought cooking wine or thrown out a carton of stock in two years, and the cubes are genuinely better than what I was buying.

Why cubes and not just a container

The problem with leftover wine and stock was never storage, it was portion size. Recipes ask for a splash, a quarter cup, half a cup. A frozen tub of stock gives you one option: thaw all of it and then find something to do with the rest, which is how you end up back where you started.

A standard ice cube is about 30ml, roughly an ounce, so two cubes is a quarter cup and four is a half. That turns an awkward leftover into a unit of measurement. You take exactly what the recipe wants, straight from the freezer, with no planning and no thawing.

It also changes what you cook. When a quarter cup of wine costs you nothing and requires no decision, you deglaze the pan. When it means opening a bottle, you don't bother. Most of the value here isn't the money saved: it's the dozen small improvements to weeknight food that become free.

Step 1: Start keeping the leftovers instead of tipping them

Pour leftover wine into a clean jar with a lid and keep it in the fridge until you've got enough to fill a tray. Cold and sealed, wine holds up well enough for cooking for several days, so you can accumulate from two or three evenings rather than dealing with every splash separately. Same with stock: decant the rest of the carton straight into a jar the moment you've measured out what you need, because a carton with a flap open is the shape that goes bad.

Wine: How Freezing Leftover Wine and Broth in Ice Cube Trays Saves Money on Cooking

Step 2: Fill silicone trays and know your cube size

Pour into flexible silicone trays, filling each cube about nine-tenths full, and measure one cube once so you know what you're working with. Mine are 30ml; yours might be 15 or 45, and it's worth the ten seconds to find out because that number becomes your recipe shorthand forever. Silicone matters far more here than for water: frozen stock grips rigid plastic hard, and you'll snap a cheap tray trying to twist it.

Tray: How Freezing Leftover Wine and Broth in Ice Cube Trays Saves Money on Cooking
My Expert Tip: Reduce the wine by half on the stove before you freeze it. Two reasons, and the second one is the part nobody mentions. First, you concentrate the flavor and halve the freezer space, so one cube now does the work of two. Second, alcohol lowers the freezing point: a full-strength wine cube never actually freezes solid in a home freezer, it stays slushy and slumps into a sticky mass the moment it's out of the tray. Simmering off some of the alcohol fixes that completely, and you get firm cubes that pop out cleanly and store like any other. Ten minutes at a low simmer while you're washing up, and the whole system works properly.

Step 3: Freeze the tray flat and give wine longer

Sit the tray level on a flat shelf, not balanced on a bag of peas, and leave stock overnight, wine a good deal longer. Cool hot stock down before it goes anywhere near the freezer; putting a warm tray in raises the temperature of everything around it. If you're freezing unreduced wine, expect it to stay firm-slushy rather than rock hard even after a full day, and plan to work fast when you handle it.

Kitchen: How Freezing Leftover Wine and Broth in Ice Cube Trays Saves Money on Cooking

Step 4: Bag them up and label properly

Pop the cubes out into freezer bags, squeeze the air out, and write what it is, the date, and the cube size on the bag. Frozen stock and frozen reduced wine look almost identical, and so do chicken and beef stock, and I promise you will not remember. Label or you'll be playing a guessing game in two months. Get them into the bag quickly so they don't start softening and fusing into one lump.

Bag: How Freezing Leftover Wine and Broth in Ice Cube Trays Saves Money on Cooking

Step 5: Cook with them straight from frozen

Drop the cubes directly into the hot pan: no thawing, ever. Two wine cubes into a pan after you've browned onions, and you've deglazed and picked up everything stuck to the bottom. Stock cubes go straight into risotto, a braise, a pan sauce, or gravy. Anywhere a recipe says "add liquid and simmer," a frozen cube works exactly as well as a measured pour, because it's going to be heated anyway.

Sauce: How Freezing Leftover Wine and Broth in Ice Cube Trays Saves Money on Cooking

Step 6: Expand it to everything else you waste

Use the same trays for tomato paste, coconut milk, leftover pesto, buttermilk, lemon juice, and chopped herbs topped with olive oil. Tomato paste is the one that converted me: a whole tin opened for one tablespoon is a classic bit of kitchen waste, and frozen in cubes it lasts months. Herbs in oil cubes go straight into a hot pan. Use stock within about six months and reduced wine within three or four; they're safe well beyond that but the flavor flattens.

Soup: How Freezing Leftover Wine and Broth in Ice Cube Trays Saves Money on Cooking

What two trays actually changed

One bottle of wine makes roughly 25 cubes, or about a dozen if you reduce it first. I've stopped buying cooking wine entirely and I haven't thrown away a carton of stock in two years: somewhere around $15 a month, so call it $180 a year, from a five-minute job I do while the kitchen is already messy.

The real change is on the plate though. Pan sauces happen on Tuesdays now. Risotto stopped being a project. It turns out most of what separates a decent weeknight dinner from a flat one is a small amount of liquid I used to pour down the drain.

Two practical notes: don't refreeze stock you've already thawed, and cool it fully before it goes in. And if anyone at your table avoids alcohol, be aware that simmering reduces it but doesn't remove it entirely: keep a bag of plain stock cubes for those dishes.

If there's half a bottle of wine on your counter right now that's going down the sink tomorrow, hit the share buttons below and send this to the friend who keeps buying that awful cooking wine.