1 part lemon juice
1 part mint simple syrup (instructions below)
2 parts water
Mix together and chill.
Mint Simple Syrup
1 part sugar
1 part water
1 handful of mint leaves
Mix everything together in either a sauce pan or a microwave safe measuring cup, making sure to "muddle" the mint in with the sugar a bit just to break it up. Bring to a boil and mix together to dissolve all the sugar. Strain out the mint leaves before using in the lemonade.
If you want some hard numbers to go by, here's an example for a recycled 2L jug:
2 cups lemon juice
2 cups simple syrup (1 1/3 c sugar and 1 1/3 c water and the mint)
4 cups water
And at the suggestion of a friend, we've using this [yummy on it's own] lemonade as a mixer with gin. Talk about beating the 96º heat!