Another Pinterest find!!! Comes from Cravings of a Lunatic and the colorful picture too!!! Go check her out!!
1 bag of mini marshmallows
10 cups Trix cereal
1/4 cup butter
Place the butter and marshmallows in a glass bowl and pop in the microwave for about 2 to 3 minutes to melt ~ I just did it on the stovetop Stir well. Mix in your trix and stir.
Pour into a large greased pan (9 x 13 or 11 x 11) and press down with a spoon.