This Birthday Rice Krispie Treats recipe is the best! Funfetti rice krispie treats with sprinkles and delicious cake batter flavor! If you're looking for rice krispie treat cake ideas for a birthday party, or you just love cake batter and funfetti, you're in the right place!
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And for more sweet treats for a celebration, try my Gluten-Free Blondies with White Chocolate Chunks, my M&M Rice Krispie Treats, and my Peach Mango Pie!
Birthday Cake Rice Krispie Treats Recipe
Now, you might be asking yourself, "Why Rice Krispie Treats for a birthday?" And honestly, I totally get it. But birthdays are all about indulgence, right? So why not go all out with something as sweet and satisfying as Rice Krispie Treats?
First things first, let's talk simplicity. Like my Rice Krispie Treats with Chocolate Chips, these classic treats are a breeze to whip up. I'm talking minimal ingredients, minimal fuss, and maximum flavor explosion – basically, party planning on easy mode.
Plus, these easy treats are like a blank canvas just waiting for your creative genius to shine. Want to add a pop of color to your cake batter rice krispie treats? Go for it! Craving some crunchy toppings? The world (or at least your kitchen) is your oyster!
Funfetti Rice Krispie Treats Recipe
The best part about this Funfetti Rice Krispie Treats recipe is the amazing cake batter flavor that comes from Funfetti cake mix mixed right in! We'll heat treat the cake mix to make sure it's safe to add in, and it gives these treats such amazing festive flavor!
Jump to:
Ingredients
Ready to get started? Here's what you'll need:
- butter - I like to use salted butter to help bring out the flavors in these birthday cake rice krispie treats! You can also use browned butter for even more flavor!
- marshmallows - you'll need mini marshmallows to get that gooey texture! Save some to add in later to have gooey marshmallows showing when you cut individual treats! And if you love marshmallows, try my Chocolate Chip and Marshmallow Cookies!
- cake mix - for the funfetti look and birthday cake flavor, you can use white cake mix with sprinkles added, or funfetti cake mix (we'll quickly heat treat the cake mix to make sure – see the recipe card below for instructions). And for another yummy cake mix recipe, try my Valentine's Day Cake Pops!
- vanilla - even when making classic rice krispie treats, I always use a high-quality pure vanilla extract. Or better yet, check out my post on how to make vanilla extract at home with just 2 ingredients!
- Rice Krispie cereal - forms the base of our rice krispie treats! Be sure to measure out your crispy rice cereal ahead of time so you can easily add it in!
- rainbow sprinkles - in the recipe card below I say use ⅓ cup, but measure with your heart! Plus, you'll need extra to add on top!
- frosting - and what's cake without a layer of frosting? I like to make this rice krispies treats recipe super easy and use store-bought frosting to spread on top of the bars, but you can always make a double or triple batch of the frosting from my Mini Vanilla Cake!
See recipe card below for ingredient measurements.
Equipment
First, you'll need a large bowl to mix everything in, and a sheet pan or a small bowl for heat-treating your cake mix. You'll also want a rubber spatula to mix everything up!
Once it's mixed, you'll put everything into an 8x8 baking pan to cool. You can also use a round cake pan! Check below for more tips to make this no bake dessert even more festive!
Instructions
Scroll down to the recipe card below for full instructions, but here are the basic steps for this birthday rice krispie treats recipe:
Melt butter in microwave in a large mixing bowl. Add most of marshmallows (save about a cup) and cake mix and heat again in microwave to melt.
Stir melted marshmallows mixture until smooth, then add remaining marshmallows, sprinkles, and cereal.
Press cereal mixture into a buttered 8x8 cake pan (or one that has been lined with plastic wrap for easy clean-up).
Let cool completely to firm up, then spread frosting on top and add lots of sprinkles!
Hint: Let your birthday rice krispie treats cool completely at room temperature, uncovered. This will allow any moisture to evaporate to prevent soggy treats.
Rice Krispie Treat Cake Ideas
How can you make this birthday cake rice krispie treats recipe even more party perfect? Here are some ideas:
- Round cake pan - use an 8-inch round cake pan instead of a square pan to make
- Layer cake - split this cake into two cake pans and layer frosting in between and on top to make it into a delicious layered birthday cake!
- Chocolate covered - Top it with melted chocolate or chocolate ganache (equal parts chocolate and heavy cream) instead of frosting!
- Color options - Add colorful frosting, or switch out the sprinkles for different colors depending on your preference, or the season!
- Candles - don't forget the birthday candles!
And check out my Confetti Cheesecake Bar Recipe for another fun birthday party treat!
Heat Treating your Cake Mix for Birthday Rice Krispie Treats
It's important to note that cake mix is NOT safe to eat straight from the box. It's a common misconception that wheat flours (and cake mixes containing flour) are safe from germs because they don't contain raw eggs. On the contrary, "germs are only killed when flour is baked or cooked" (CDC).
So to make these delicious birthday cake rice krispie treats as safe as possible, we'll heat treat our cake mix! Simply measure out the cake mix you'll need for this recipe (½ cup) and add it to a microwave-safe bowl. Heat on high for 30 seconds, stir, and measure the temperature with a food thermometer. If it hasn't reached 165 degrees Fahrenheit, heat it for another 30 seconds, repeating the process in 30 second intervals until the temperature reads 165 degrees.
Storage
For the best results, I would recommend enjoying these treats the day you make them. But if you do store them for later, be sure to let your rice krispie treats cool completely so any excess liquid can evaporate before storing.
They should be good at room temperature for up to 3 days in an airtight container, or they can be frozen, well wrapped in plastic wrap or parchment paper, for up to 2 months.
Top Tip
Don't forget to heat treat your cake batter! Whether you microwave it or heat it in the oven, use a food thermometer to check that it has reached at least 165 degrees F before mixing it in.
Frequently Asked Questions
In my experience, it's much more affordable to make your own -- you can make several batches from one box of crispy rice cereal, and with only three base ingredients, it definitely won't break the bank!
But more importantly, the taste and texture difference is off the charts! I can't imagine buying packaged rice krispie treats when it's this easy to make them myself and they're SO much better!
I would make this birthday cake rice krispie treats recipe no more than 2 days before you plan to enjoy them!
It's every year on September 18th! Definitely one of my favorite food holidays because it's so easy to celebrate! Try my Fancy Rice Krispie Treats with Brown Butter and White Chocolate Ganache for an even more decadent treat!
Related
Looking for other recipes like this? Try these:
Pairing
These are my favorite dishes to serve with [this recipe]:
If you try this recipe, I would love it if you could leave a star review rating and comment below! It’s so wonderful hearing your feedback! And don’t forget to share your creations with me by tagging @chenee_today on Instagram!
📖 Recipe
Equipment you may need
Ingredients
- ½ cup (64 g) white or funfetti cake mix - heat treated – see note
- 6 tablespoon (84 g) salted butter
- 10 oz (283 g) mini marshmallows - one 10-oz bag, divided
- ½ teaspoon (2 ml) pure vanilla extract
- 5 cups (140 g) crispy rice cereal
- ⅓ cup (53 g) rainbow sprinkles - plus more for topping. If using a white cake mix, you'll need to mix in an extra teaspoon of rainbow sprinkles
- ⅔ cup (158 g) storebought frosting - optional
Instructions
- Heat treat cake mix: Add cake mix to a small microwave-safe bowl. Heat on high for 30 seconds, stir, and measure the temperature with a food thermometer.½ cup white or funfetti cake mix
- If it hasn't reached 165 degrees Fahrenheit, heat it for another 30 seconds, repeating the process until the temperature reads 165 degrees. Set aside.
- In a large bowl, melt butter in microwave in 30-second increments.6 tablespoon salted butter
- Add most of the marshmallows, reserving about ⅔ cup to add in later, followed by heat-treated cake mix.10 oz mini marshmallows
- Return bowl to microwave for another 30 seconds. Remove and stir to finish melting the marshmallows. Stir in vanilla.½ teaspoon pure vanilla extract
- Immediately add cereal and sprinkles and stir to coat cereal completely with m marshmallow mixture.5 cups crispy rice cereal, ⅓ cup rainbow sprinkles
- Press mixture gently into a greased 8x8 baking pan (or 8-inch round pan). Let sit, uncovered, a room temperature to cool completely.
- Spread frosting (if using) over top of cooled treats and top with more sprinkles. Store at room temperature in an airtight container until ready to serve.⅔ cup storebought frosting
Video
Nutrition
Food Safety
Don't eat raw cake mix! Cooking the cake mix to at least 165 degrees F will kill any bacteria and make sure it's ready to eat.
See more guidelines at USDA.gov.
Last Updated on February 19, 2025 by Chenée Lewis
TAYLER ROSS says
My new favorite rice krispie treat recipe! So delicious and fun and festive!
Chenée Lewis says
Thank you so much! I'm so happy you liked them!
Elisa says
Love this Birthday Rice Krispie Treats recipe, never thought of making my own, but now I have the recipe, will make this for the next birthday of my kiddos, looks so fun and delicious. Thanks for sharing 🙂
Chenée Lewis says
You're welcome! Enjoy!
Paula says
Such a fun birthday treat! We love all things sprinkles, excited for this one!
Kim says
This looks like such a fun treat! My nephew's birthday is coming up and I think this will be perfect to make for the party.
Sara Welch says
This was such a fun twist to traditional birthday cake! Turned out quick, easy and delicious; definitely, a new favorite way to celebrate birthdays!
Chenée Lewis says
I'm so glad you liked it!