Well all last week I procrastinated on making some new fly cultures due to having to wash old cups first. Finally got to Friday afternoon and I needed to make cultures prior to a busy weekend. I brought out the media and to my surprise it was literally almost gone. I scrounged and was able to make 2 cultures when I normally have been making 6.
I had two choices at this point. Try making my own media or buying new media with expedited shipping. I have been thinking about trying my own media mix for months now but honestly never have actually done it. I guess there is no time like the present to start making my own!

After quickly stumbling upon many recipes I settled with:
-1 cup powdered potato flakes
-1/4 cup powdered sugar
-splash of vinegar
I then added water until it was a consistency that I liked & I then sprinkled active dry yeast & cinnamon on top & mashed in excelsior. This recipe was mainly decided upon because this one I had everything I needed at home and ready to go.
Left: HomeMade Media
Right: Saurian Media

It looked good on the day I made it at least. I will have to update with how it performs. I have ordered some more Saurian mix and will start a new round of cultures tonight!
Do you have any home made fruit fly media recipes you like?
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I also make 6 cultures every week. I experimented years ago, and this is what I came up with! Microwave 3-4 bananas, 2-3 minutes. Add about equal amount applesauce, and a splash of apple cider (or regular) vinegar. Add 2-3 T brewers yeast. Add oatmeal til you get the right consistency. Put into cups, put a pinch of cooking yeast in each cup. Add excelsior, etc (I use Easter grass), then flies.