Invert sugar can be easily made at home by boiling a mixture of cane sugar, cream of tartar (citric acid may be used as a substitute), and water.
Step 1: Ingredients
1/2 pound (226g) cane sugar
1/8 tsp (1/2g) Cream of Tartar (Citric acid can be used)
3/4 cup (175ml) distilled water
Step 2: Making the Syrup
Once the mixture has started to boil do not stir any longer.
The mixture needs to be cooked at a minimum of 236 degrees Fahrenheit (114c) for 20 minutes (for a lighter colored syrup) up to 2 hours (for a darker syrup).
While cooking it is helpful to brush down the sides of the saucepan with a wet pastry brush to help remove any sugar crystals that may have stuck.
Cover, let cool, then place into desired container into the refrigerator. Invert sugar can be stored for up to 1 year!