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Gather the ingredients and tools. Combine the ingredients in a medium sized saucepan. Heat and stir the mixture until thick. Remove from heat, add color, and allow to cool.
Before making a batch of edible sweetened condensed milk slime, gather following ingredients and tools:  1 medium sized Saucepan 1 14 ounce can Sweetened Condensed Milk 1 Tablespoon Cornstarch Green Food Coloring This sweet green slime contains sweetened condensed milk, cornstarch, and green food coloring. It is safe to consume.  Open the 14-ounce can of sweetened condensed milk with a can opener. Pour the contents of the can into the saucepan. Measure 1 Tablespoon cornstarch. Add the cornstarch to the saucepan. This edible green slime is heated on the stovetop.  Place the saucepan over a low heat. Stir the mixture constantly. Once thick, remove the mixture from the heat and add 3 to 5 drops of green food coloring. Stir the food coloring into the mixture. Before playing with the slime, or pouring it on an unsuspecting victim, allow the mixture to cool.