Ice cream - just make ice cream with it when it starts to get old.
I love my little table top
maker. Very convenient, not very loud and takes care of this issue easily. When you notice your cream is old, just stick the double walled bowl in the freezer overnight beforehand. I like to give it 24 hours of solid freezing.
I don't even use a recipe, just dump in enough milk products to make a little over a quart, add a cup of sugar, and maybe 2 tsp of really high quality vanilla, stir, stir, stir until the sugar is has lost granularity, throw it in the maker and wah, lah! I usually stick it out on the balcony to get rid of the noise all together.
30 minutes later - take it out of the maker, and either serve as soft-serve, or put it in another container and move it to the freezer for hardening.
2 small notes:
1 - the freezing process incorporates air so never make as much mix as it calls for - ie. mine makes 1 1/2 quarts, but I make just over 1 quart of mix.
2 - don't harden the ice cream in the double walled bowl. I ruined one that way.
Anywho... that's MY way of dealing with extra heavy cream in the fridge.
LL