I know I've kept my bacon grease for at least 3 weeks in the fridge in a glass jar and it's been fine. I use it for cooking burgers in and making lard/bacon mayo!
Voila! Recipe...
1 whole egg
2 egg yolks
~1/3C lard
~1/3C bacon grease
{mix the oils together and melt so they are liquid}
mustard, s&p, squirt of lemon juice and/or ACV, garlic powder to taste
a TBSP of whey or kimchee or sauerkraut juice (for good bacteria and preservation!)
I mix it up in my Vitamix, but you could probably use whatever blender {regular or immersion}. I start with all the eggs, then the mustard, then spices, turn up the speed a bit to Med. then drizzle the melted oils in slowly. Put it in a glass jar, let it sit our for a few hours, then refrigerate! Its lasted at least a couple weeks for me.
Makes a TOTALLY delish chicken salad with chopped red onions!!

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