Yes, making marshmallow treats in the microwave is a quick and convenient alternative to the traditional stovetop method. Start by melting the butter and a bag of mini marshmallows in a microwave-safe bowl. Microwave in 30-second intervals, stirring each time until smooth (usually 2-3 minutes). Stir in the cereal, press into a pan, and cool for about 30 minutes before slicing and serving.