
These go way beyond basic rice krispie squares. Mixing up toasty brown butter, cinnamon-packed cereal, and a surprise streak of gooey dulce de leche turns this kid favorite into something grown-ups can't resist. We've thrown in extra marshmallows at the finish to create little pockets of stretchy goodness, with a touch of sea salt bringing everything into balance. They're just right when you want something sweet without firing up the oven.
I took these to a dinner party a few weeks back and handed out the instructions to five folks before heading home. My guy, who usually skips sweet stuff, gobbled up three pieces and tucked one away for a late-night snack. There's just something about that mix of salty, caramel, and cinnamon that nobody can turn down.
Key Components
- Butter - Go for unsalted so you can manage how much salt goes in. I like European-style since its higher fat makes even tastier brown butter.
- Mini marshmallows - These tiny ones melt better than the jumbo size. Saving some to mix in later gives you those awesome stretchy bits when you take a bite.
- Cinnamon sugar Rice Krispies - This spiced version brings warmth that works beautifully with the caramel notes. That hint of cinnamon really sets these apart from plain treats.
- Dulce de leche - You'll find this creamy caramel in the world foods aisle or near condensed milk. Its thick, smooth texture makes for the ideal middle layer without going overboard on sweetness.
- Sea salt - The fine type blends perfectly into the marshmallow mix and makes all the flavors pop. Its subtle mineral quality cuts through the sweetness just right.

Step-by-Step Guide
- Get your pan ready
- Cover a 9×9-inch baking dish with foil or parchment, leaving extra hanging over the sides for easy lifting later. Give it a good coating of non-stick spray. This step saves tons of hassle when it's time to serve.
- Make your brown butter
- Heat a pale-colored pot over medium heat and drop in your butter. Keep an eye on it as it melts, bubbles up, and then starts showing golden specks at the bottom. This step turns simple butter into something magically nutty that lifts the whole dessert.
- Mix the gooey base
- Take that brown butter off the heat right away before it burns, then toss in sea salt and 8 cups of mini marshmallows. Keep stirring until they've totally melted into a smooth mix. You want it looking shiny with no lumps of marshmallow left.
- Boost the flavor
- Stir in some vanilla extract, which makes everything taste better without standing out too much. Most folks won't pick out the vanilla specifically, but they'll notice something extra special about these treats.
- Mix with your cereal
- Pour your warm, melty marshmallow mix over the measured cereal and fold everything together until all pieces are coated. Work fast but don't smash the cereal. You want every bit looking shiny with marshmallow.
- Add texture
- While still warm but not hot, fold in your saved mini marshmallows. They'll get soft but keep their shape, giving you awesome spots of pure marshmallow throughout.
- Stack your layers
- Push half the mixture into your ready pan, making a flat base. Spread dulce de leche on top, leaving a small edge around the sides. Cover with the rest of your cereal mix and gently flatten it all out.
- Let them set up
- Let everything cool at room temp until firm. Having patience here means treats that hold their shape when cut but stay nice and chewy. Don't put them in the fridge or they'll get too hard.
I first tried dulce de leche during a vacation in Argentina some time back. I got hooked on finding ways to use it in my cooking when I got home. One day while making rice krispie treats with my niece, a lightbulb went off – what about adding a layer of that silky caramel stuff? We gave it a shot, and now it's a must-have at family get-togethers. Nobody lets me show up without bringing a batch anymore.
Ways To Serve
Cut these rich treats into bite-sized cubes and put them on a dessert platter with some fresh berries and chocolate goodies for a no-bake treat that looks fancy. For something really special, plop some vanilla ice cream between two squares to make the most incredible ice cream sandwich ever. During holiday season, wrap them in clear bags with ribbons for homemade gifts that everyone loves.
Tasty Twists
Switch to chocolate rice krispies for a chocolate-caramel combo that tastes like a fancy candy bar. Try mixing in 1/2 cup of toasted chopped pecans for a nice crunch that goes great with the brown butter. Want a salted caramel version? Just sprinkle some flaky sea salt on top right after pressing the mixture into the pan – those little salt crystals create amazing flavor pops.
Storage Tips
After they've cooled completely, put them in an airtight container with parchment between the layers so they don't stick together. They'll stay perfect at room temp for 2-3 days, though they rarely hang around that long at my place. Need to keep them longer? Wrap single pieces in plastic and freeze for up to six weeks – just let them sit out for about 30 minutes before eating.

Expert Tricks
- Use a light-colored pot when browning butter so you can easily spot when it hits that perfect golden shade
- For neat squares, cool treats for just 15 minutes in the fridge before cutting with a knife dipped in hot water
- Save a handful of mini marshmallows to press into the top for a pretty look that shows what's inside
I've whipped up tons of rice krispie treats in my time, but this version has become my go-to dessert. There's something special about how everything comes together – that light crunch from the cereal, the pull of marshmallow, and that smooth dulce de leche running through the middle. The brown butter gives them this rich, nutty taste that makes people stop and wonder why these taste so much better than the ones they remember. They're easy enough for a random Tuesday but fancy enough for company, which makes them perfect for pretty much any time.
Frequently Asked Questions
- → Can I swap cinnamon cereal for plain Rice Krispies?
- Totally! Sprinkle on 1/4 to 1/3 cup of cinnamon sugar to maintain the flavor profile.
- → How do I tell when my butter's browned?
- It’ll release a nutty smell, and you’ll notice small golden spots on the pan’s bottom. Pull it off the heat immediately to avoid burning.
- → Can these bars stay in the freezer?
- Yes, up to 6 weeks! Just stack them in an airtight container with parchment paper to keep them separate.
- → What can I do if my dulce de leche is super thick?
- Gently heat it up in the microwave for 10-15 seconds, or mix in 1-2 teaspoons of warm cream to loosen it.
- → Why stir in whole marshmallows that are unmelted?
- The whole, unmelted ones make your treats gooier with little bursts of soft, chewy fun!