Yes! You can combine grease from different bacon sessions. But here’s the catch: each time you add fresh hot grease to an older jar, you’re potentially introducing new bacteria if you don’t reheat the whole thing first.
If you’re mixing batches, strain and reheat the whole jar to boiling before adding new grease. Sounds fancy? It’s just science with a side of bacon.
Or, do what I do: have two jars. One jar for “this week’s fresh hero” and one jar for “the leftovers that shall be frozen.” You’ll be the organized greaser of your friend group.
How Long Can You Keep Bacon Grease? Proper Storage Tips - Frugal Living
When to Wave the White Flag and Say Goodbye
If your grease has been sitting out for a week and you’re not sure, smell it. If you hesitate—just toss it. Your body is smarter than an Instagram cooking hack.
If it’s been in the fridge for six months and you can’t remember which president was in office, throw it out. You don’t need a time-traveling fat for your eggs.
And for the love of all things crispy, never, ever taste it to check. That’s how you become the person who tells a regrettable story at parties.
