Question: how to make edible slime?
Answer: Combine the sweetened condensed milk, sugar, and cornstarch. Open a 14 ounce (396 g) can of sweetened condensed milk and spoon it into a small saucepan. ... 
Stir and cook the slime for 10 to 15 minutes. ... 
Mix in food coloring if desired. ... 
Cool the slime completely before using it. ... 
Refrigerate the slime for up to 5 days.