Put each lemon in the microwave for about 15 seconds before squeezing. This will help the lemon give up more juice.
Roll the lemon in your hands or on a counter.
Slice each lemon in half and hand squeeze or use a lemon juicer to extract juice from each lemon half.
You want to get about 3/4 cups of juice in total from all the lemons.
Run the lemon juice through a strainer to get out all the seeds and bigger pieces of pulp.
Pour lemon juice into a 2 quart pitcher.
Add 1 cup of sugar and lemon extract.
Fill pitcher with water until it reaches the spout lip.
Stir until all the sugar is dissolved.
At this point, do a taste test. Not all lemons are equal. Some are more sour than others so you'll want to make sure your lemonade is to your liking at this point.
It may need a bit more sugar or perhaps you want it more sour and want to add a a bit more lemon juice. You may even want to add a bit more lemon extract.