Melt butter and mix Marshmallows together. Either on medium on the stove top. Or in 30 second increments in the microwave.
Once melted, add and stir in the yellow food coloring
Add and stir in Rice Krispies cereal. Make sure that mixture is evenly distributed.
Spread mixture into pan with greased spatula.
Let treats cool for around 30 mins and then cut and enjoy!