Did you know adding heat to coffee beans releases lots of acidity? Apparently it's true. Google it or something. I've tried just using leftover brewed coffee to make an iced coffee drink but it's always too bitter for my taste. The answer is cold-press coffee. It's a little messy to make, but it's worth it.
Once you make the cold-press coffee syrup, you use that as the base. To drink, mix 1 part syrup with 1 part water or milk (either hot or cold!) and sweeten to taste.
Cold-Press Coffee (small batch)
1 cup ground coffee (not ground too finely)
Add to french press and fill with water.
Let sit at room temperature overnight.
Push down on press and pour out the syrup - will keep in fridge for awhile!
My drink above is half syrup and half vanilla soymilk on ice. Delicious, and LOTS cheaper than Starbucks!
Cold-Press Coffee (large batch)
1 lb coarse ground coffee
10 cups water
Mix in large pot, cover, and let sit at room temperature overnight.
Strain through a kitchen towel or cheesecloth to save the syrup (this is the messy part).
Store in mason jars or other pretty glass bottles you may have on hand.