I make homemade lemonade all the time. It is really very easy. I try to buy the organic lemon juice from Trader Joe's when I can but I do compromise and sometimes buy the lemon juice from Sam's Club (don't hate me).
Makes 2 quarts
1 cup of lemon juice
1 cup of sugar (can add a little less sugar)
2 quarts of water
Mix all ingredients in a pitcher.
To make the lemonade slushie:
I have a Cuisinart Ice Cream maker. These are handy and I would recommend getting one. You can do a lot with it. I bought mine on sale at Bed, Bath and Beyond. You can also make these in the blender just as easily.
Directions for the ice cream maker:
Pour lemonade into ice cream maker, turn on and allow the machine to go for 20 minutes. Serve slushies.
Directions for a blender:
Put crushed ice in the blender until half full. Pour lemonade in until it is about an inch from the top. Process until slushy.
You should have some lemonade left over to pour in the glasses when it is just ice left (after the kids have sucked them dry). You could probably add frozen strawberries to the blender too to make strawberry lemonade.
Do you make lemonade slushies? How do you like them?