1 cup mini marshmallows
1 to 2 tablespoons cornstarch
1 tablespoon coconut oil or butter
1 to 2 tablespoons powdered sugar
Food coloring, optional
Melt the marshmallows with the coconut oil or butter
Stir until smooth
Add food coloring, if using
Mix in cornstarch and powdered sugar a little at a time
Knead until stretchy and slime-like
Add more cornstarch for less stickiness
Add more coconut oil or butter for more stretch
Store in an airtight container
Discard after 1 to 2 days