These Homemade Fruity Pebbles Rice Krispie Treats are super gooey thanks to the extra marshmallows used in the recipe! We top ours with sea salt to amp up the sweet-salty flavor!
Spray a 9×9-inch pan with non-stick spray and line it with a foil or parchment paper sling. Spray again.
In a very large microwave-safe bowl, or in a pot on the stove over medium heat, place your butter, salt, and 8 cups of mini marshmallows. Microwave in 30-second increments, or heat, stirring in between, until everything is completely melted and smooth.