Marshmallow Crisp (Microwave Rice Krispies Squares)

Recipe by Lennie
READY IN: 8mins
YIELD: 12 squares


  • 14
    cup butter
  • 1
    (10 ounce) package large marshmallows (see directions for other quantities)
  • 5
    cups crispy rice cereal (like Rice Krispies)


  • If you want to use large marshmallows, the recipe says to use an entire 10-oz package, or 40 large marshmallows. I always use 4 cups of miniature marshmallows, however.
  • You will need a buttered (I just use nonstick cooking spray though) oblong pan and a large casserole dish with a lid that can go into your microwave. If you use a 13x9 pan your squares will be very flat, so my personal preference is to use a smaller pan so I get thicker squares.
  • Place butter in casserole dish and microwave until melted, about a minute or so on High.
  • Add marshmallows, stir, and cover. Microwave on High for 2 minutes, remove and stir, then re-cover and microwave for about another minute or so, until marshmallows melt. Stir until well blended.
  • Add cereal and stir until well coated. I use a wooden spoon.
  • Transfer mixture into prepared pan. Wet your hands a bit under the tap, shake off excess water, then use your hands to flatten cereal mixture into the pan. Dampen hands again if mixture starts to stick.
  • Set aside to cool and set up, then cut into squares. Keep covered tightly if you have leftovers.
  • Variation: after you add cereal, you can also stir in one cup of chocolate chips or a chocolate candy like M&Ms.