Rice Krispie Treats

Steps

1. Grease a 9x13-inch baking pan with non-stick spray or butter.
2. Melt the marshmallows with the butter, either on the stove over low heat, stirring constantly until smooth, or in the microwave in 15-second intervals, stirring between each.
3. Stir in the salt and vanilla, if using.
4. Add the cereal and mix until fully coated.
5. Pour the mixture into the greased pan and press flat with a spatula.
6. Let cool for 15 minutes, then cut into bars and serve.