Let’s be honest — onions are the unsung heroes of the kitchen. They’re the foundation of countless recipes: soups, sauces, stir-fries, stews, you name it. But if there’s one universal truth about onions, it’s this — nobody enjoys chopping them. The watery eyes, the lingering smell, the mess on the cutting board… it’s enough to make you skip them entirely (and then regret it when your food tastes flat).
That’s why I swear by my favorite kitchen hack: pre-chopping onions in bulk.
The Costco Trick That Changed My Cooking Routine
Here’s how it started. One weekend, I grabbed a 10-pound bag of yellow onions from Costco — the big, affordable kind that seem to last forever. Normally, that’s the kind of purchase that sits on the pantry shelf until a few start to sprout. But not this time.
Instead, I set aside 30 minutes, turned on some music, and went into full prep mode: peeled, chopped, and portioned every single onion. It was oddly satisfying, and when I was done, I had a mountain of beautifully diced onions ready to go.
How to Store Pre-Chopped Onions (Without Losing Freshness)
There are two easy ways to store your onion haul:
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