Old Sour Mix is one of those old-school kitchen shortcuts that earns its keep fast. It takes just two ingredients, gives you a bright salty-tart splash of flavor, and works anywhere you’d normally reach for bottled citrus seasoning, from seafood to crisp salads to a plate of fresh vegetables.
Because this mix is mostly bottled lime juice and salt, you can stir up a batch in minutes, strain it for a smoother finish, and keep it ready for quick meals. Stored in a clean airtight jar in the refrigerator, it keeps best for about 5 to 7 days after opening, which lines up well with general guidance for high-acid opened juices from the USDA on shelf-stable juices and refrigerated storage.
Ingredients
- 2 cups lime juice
- 1 tablespoon salt
This simple combination makes about 2 cups plus 1 tablespoon of finished mix, or roughly 33 tablespoons. If you use about 1 tablespoon per serving, that gives you an estimated 33 servings.
Instructions
- Combine the lime juice and salt in a bowl or measuring pitcher.
- Stir until the salt dissolves as fully as possible.
- Strain the mixture through cheesecloth or a coffee filter into a clean jar.
- Cover tightly and refrigerate until ready to use.
Tips for Best Results
Use a measuring cup with a spout or a small pitcher when you mix this. Pouring strained liquid into a jar is much easier when you’re not trying to balance a bowl in one hand and a funnel in the other. That trick saves cleanup and a few choice words.
If the salt settles, give the jar a quick shake before using. Fine salt dissolves faster than coarse salt, so if you swap salt types, expect the mixing time to change a bit.
For a cleaner finished texture, strain slowly rather than forcing the liquid through the filter. A coffee filter takes longer than cheesecloth, but it catches more pulp and gives you a smoother final mix.
If you like making pantry staples from scratch, you might also like Old Bay Seasoning or browse more Seasoning and Spice Mixes for easy DIY kitchen basics.
Serving Ideas
Drizzle Old Sour Mix over cooked shrimp, broiled fish, or crab for a quick bright finish. The salt is already built in, so taste before adding more seasoning to the plate.
It also works well tossed with salad greens, sliced cucumbers, radishes, or chopped tomatoes when you want a very light dressing. If you prefer a fuller salad dressing, whisk 1 tablespoon of Old Sour Mix with 2 to 3 tablespoons of oil for a simple citrus vinaigrette.
Try a spoonful over fresh vegetables right before serving. It wakes up bland produce in a hurry, which is handy on days when dinner needs help and you do not have the patience for a full dressing recipe.
Storage
Pour the strained mix into a clean glass jar or food-safe airtight container and refrigerate it promptly. For best quality and a conservative food-safety estimate, use it within 5 to 7 days.
If it develops an off smell, cloudiness that looks unusual for your juice, or any visible spoilage, discard it. Keep the rim of the jar clean and use a clean spoon each time so you do not shorten its storage life by accident.
This mix is not a shelf-stable canning recipe, so keep it cold rather than storing it in the pantry after opening.
Variations
For a milder finish, reduce the salt slightly and taste after the mix has rested for a few minutes. Salt perception changes once it fully dissolves, so it is smarter to adjust slowly than to dump in more and regret your life choices.
You can also use this as a base for a quick table sauce by whisking in a little oil just before serving. Keep the plain strained mix separate if you want the longest refrigerator life and the most flexibility.
If you enjoy tart homemade flavor boosters, Tricks for Using Fresh Limes in Recipes has more ways to get the most from citrus in everyday cooking.
💸 Budget101® Price Breakdown: Old Sour Mix
Ingredient |
Walmart Item |
Pkg Price |
Amount Used |
Cost Used |
|---|---|---|---|---|
Lime juice |
$0.50 |
2 C. |
$8.00 |
|
Salt |
$0.62 |
1 T. |
$0.02 |
💸 |
Cost |
|---|---|
🧾 Total Batch Cost |
$8.02 |
👨👩👧👦 Cost Per Serving |
$0.24 |
📅 Walmart prices last verified August 26, 2026. Prices may vary by location and are subject to change. Learn how to calculate the cost of a recipe on your own!
🛒 Walmart Grocery List
Not sure exactly what this batch costs you per serving? Here’s how to break down the real cost of any recipe so you know before you shop.
Frequently Asked Questions about Old Sour Mix
You can, but expect a shorter refrigerator life and a little more pulp unless you strain it very well. Bottled lime juice is more consistent from batch to batch, while fresh limes can vary quite a bit in acidity and flavor depending on the fruit.
Straining removes pulp and any undissolved bits so the finished mix pours cleanly and tastes smoother. A coffee filter gives you the clearest result, but cheesecloth is faster if you do not want to wait around watching citrus drip one drop at a time.
Start with about 1 to 2 teaspoons per serving and add more only if needed. Since the mix already contains salt, a little goes a long way and it is easier to add another splash than to fix over-salted shrimp or fish.
Absolutely. Whisk 1 tablespoon of Old Sour Mix with 2 to 3 tablespoons of oil for a quick citrus vinaigrette, then shake or whisk again right before serving because homemade dressings separate naturally.
Regular table salt is the safest bet here because it dissolves quickly and measures consistently by tablespoon. If you use kosher salt instead, start with less and taste, since crystal size changes how much salt you actually get in the spoon.
Yes, just keep the same ratio of 2 cups lime juice to 1 tablespoon salt. Mix in a larger pitcher, stir until dissolved, then strain into smaller jars so you only open what you need instead of exposing the whole batch every time.
That usually means it did not fully dissolve before storage, or the juice was cool and slowed things down. Give it a good shake and, next time, stir a little longer before straining and bottling.
It is especially good on cucumber slices, tomato wedges, shredded cabbage, avocado, and simple green salads. Anything that benefits from a sharp salty citrus hit will usually play nicely with it.
Yes, if you want to stretch the batch longer. Freeze it in small portions such as ice cube trays, then thaw only what you need so you are not refreezing the whole jar over and over again.
Discard it if the smell turns dull or off, the color changes noticeably, or you see anything that looks like spoilage. Citrus mixes are simple, but they are not magic, and when in doubt, make a fresh batch in five minutes and move on.
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