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Home » Recipes » traditional flavors

Rice Krispie Treat in a mug

Modified: Nov 4, '24 · Published: Jul 8, '20 · By: Meaghan Mountford · Commission earned on paid or sponsored links.

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Our Rice Krispie Treat in a mug is perfect when you just want dessert NOW.

 rice krispie treat in a mug with sprinkles

Rice Krispie Treat in a mug

Ever get those midnight cravings when you want something sweet? This single-serving Rice Krispie Treat in a mug is your answer! Only three ingredients and a minute in the microwave.

Here, we start with our best-ever Rice Krispie Treat recipe and do all the math for you to make a perfect, single size, with a smidge more marshmallows to keep it gooey enough to spoon.

spoonful of rice krispie treat in a mug with sprinkles

instructions

First, I'll share the instructions for making mug treats, but you'll find more how-tos below for making single-serve cereal treats in ramekins.

  • Spray a large mug with cooking spray OR grease with butter.
  • Place 2 ounces of marshmallows in the mug and top with 1 tablespoon of salted butter.
    • 2 ounces of marshmallows is about 8 regular size or a heaping cup of mini marshmallows.
    • TIP: The butter helps weigh down the marshmallows, so be sure to add it on top.

ingredients to make rice krispie treat in a mug

  • Heat in the microwave for 30 seconds. Be sure to watch the mug! If the marshmallows reach the top of the mug, stop and quickly stir before continuing to heat.
  • Let the marshmallows sit for 30 seconds and stir very well until smooth.

making rice krispie treat in a mug

  • Gradually stir in 1 cup of Rice Krispies cereal.

stirring rice krispie treat in a mug

  • If desired, top with sprinkles!

 rice krispie treat in a mug with sprinkles

supplies and ingredients

Kellogg's Rice Krispies Col...Shop on AmazonJet-Puffed Marshmallows, 1 ...Shop on AmazonKerrygold Pure Irish Butter...Shop on Amazon365 Everyday Value, Organic...Shop on Amazon
Bosmarlin Large Glossy Cera...Shop on AmazonSweets Indeed Sprinkles, Ed...Shop on Amazon

Rice Krispie treats for one (or two)

For another single-serve Rice Krispie treat idea, prepare the above recipe in a microwave-safe bowl. You'll have to worry less about the marshmallows puffing over the edge, and you may need 15 to 30 additional seconds of heating time.

Transfer the treats into two, greased ramekins.

single serve Rice Krispie Treats

what can I stir into Rice Krispie treats?

When adding the cereal, feel free to personalize your mug treat! Add a tablespoon or two of

  • peanut butter
  • chocolate chips
  • chopped, dried fruit
  • chopped nuts
  • sprinkles

video how-tos

printable recipe

rice krispie treat in a mug with sprinkles

rice krispie treat in a mug

Meaghan Mountford
Have a craving? This single-serve Rice Krispie Treat in a mug is the answer!
5 from 3 votes
Print Recipe Pin Recipe
Prep Time 10 minutes mins
Cook Time 1 minute min
Course Dessert
Cuisine American
Servings 1 mug
Calories 394 kcal

Equipment

  • large mug
  • cooking spray

Ingredients
  

  • 2 ounces marshmallows 8 regular size or a heaping cup of mini
  • 1 tablespoon salted butter
  • 1 cup Rice Krispies cereal
  • sprinkles (optional)

Instructions
 

  • Grease a large mug with cooking spray. Add the marshmallows first and top with the butter.
  • Heat in the microwave for 30 seconds and let rest for 30 seconds.
  • IMPORTANT! Be sure to watch the mug. If the marshmallows puff up to the top, stop heating, give a quick stir, and resume heating.
  • Gradually stir in the cereal.
  • If desired, top with sprinkles.

Notes

You may also make two individual servings with this recipe.
Instead of the mug, follow the instructions above with a microwave-safe bowl. You may need to add an additional 15 to 30 seconds of heating time.
Transfer to two, small, greased ramekins and let set. 
Keyword rice krispie treat in a mug

 rice krispie treat in a mug with sprinkles

more mug recipes

Love mug recipes? Check out this roundup of microwave mug recipes for breakfast, lunch, dinner, and dessert.

  • Vanilla mug cake is my daughter's favorite.
  • You can even make mac and cheese in a mug.
  • Or try chocolate cake in a mug. 

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Comments

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    Recipe Rating




  1. Javier S. says

    July 17, 2020 at 5:13 am

    This is such a fun idea. I can't wait to try it.

    Reply
  2. Sarah Stone says

    August 02, 2020 at 12:56 pm

    5 stars
    I would have never thought to make a small batch of rice krispie treats. I love the treats but feel wasteful when I make an entire pan and throw half of them away. This recipe was perfect. I'll be using it again and again. Thanks!

    Reply
  3. Nancy Capelo says

    May 15, 2021 at 3:45 pm

    This is brilliant!

    Reply
  4. Lauri Nims says

    June 29, 2021 at 6:22 am

    5 stars
    This was such a fun recipe! My 9-year old daughter has fallen in love with this. She's been making these mug treats every day this week. Thanks for the great idea.

    Reply
  5. Darren says

    July 09, 2021 at 10:51 am

    5 stars
    Thanks for sharing this recipe. I enjoy rice krispie treats but live alone and would usually through half of the treats away after they got stale. This small treat in a mug is perfect.

    Reply
  6. Maryeileen says

    July 25, 2023 at 6:07 pm

    Can the Rice Krispie Treat in a mug be made with marshmallow fluff? If so, how much fluff would you need? Thanks!

    Reply
    • Meaghan Mountford says

      July 25, 2023 at 6:29 pm

      Hi Maryeileen! We do have a recipe for marshmallow fluff Rice Krispie Treats, although I've not tried it in a mug. Rice Krispie Treats with fluff have a bit more cereal, since the fluff is gooier. So here, I use 2 ounces of marshmallows for the mug treat. I would try a LESS than 2 ounces of fluff (so start with about 1/4 of a 7ounce jar). But it might take some trial and error to get the ratio perfect, as I'm only guessing. But might be a great idea for another blog post for us!

      Reply
Beth and Meaghan from How To Make Cereal Treats

Meet Beth and Meaghan. We are recipe developers, food photographers, and cookbook authors who love sharing creative cereal treat recipes with you.
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Beth and Meaghan from How To Make Cereal Treats

Meet Beth and Meaghan. We are recipe developers, food photographers, and cookbook authors who love sharing creative cereal treat recipes with you.
Read more about us →

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Buy our cookbook

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