Green Spinach Food Coloring

Steps

1. Blanch the spinach by boiling in a large volume of water for 2 minutes (until bright green) then draining and quickly transferring to cold water. Let rest 1–2 minutes.
2. Drain the spinach and blend it to a purée with the ½ cup (125 ml) water.
3. Using a cheesecloth, strain the purée into a bowl to extract the juice.
4. Pour the juice into a pan and add sugar.
5. Turn the heat to medium-high, and stir to dissolve the sugar.
6. Skim off and discard any foam that collects at the surface of the liquid.
7. Turn the heat to high and boil until the liquid reduces to a single-thread consistency.
8. Turn off the heat and stir in the lemon juice.
9. Cool slightly, then pour into an airtight jar and cool completely.