These killer crunch brownies are a brownie explosion! Fudgy brownies, sweet marshmallow cream, and crispy chocolate peanut butter topping.
One of my favorite desserts on the planet, these killer crunch brownies are something special.
Texturally, they are perfect. Fudgy brownie + creamy marshmallow filling + crunchy topping. Seriously, amazing.
But the flavors are spot on delicious, too. The hint of peanut butter in the rice krispie topping is heavenly with the marshmallow and brownie layers.
Rice Krispies for Life
The marshmallow layer in these brownies is good and all, but it’s the crispy peanut butter chocolate layer that is absolutely stellar.
Something about adding that light and airy crunchiness to the top of the rich, soft brownie does something inherently good for my soul.
Easiest Brownies in the World
The brownie base for these killer crunch brownies is from one of my favorite brownie recipes. A bag of chocolate chips, some butter, a bit of sugar and flour is about all you need to make rich, decadent brownies.
It’s the perfect recipe for layering on marshmallow fluff and then the crispy topping.
The recipe makes one 9X13-inch pan of brownies, but it can easily be doubled for a half sheet pan or for two pans of brownies (I mean, why not??).
While the brownies are still warm, right out of the oven, dollop the marshmallow fluff (or creme) over the top in large spoonfuls.
Wait a minute or two and then spread the sticky glorious stuff into an even layer. It’s ok if a tiny bit of the brownie top pulls up into the marshmallow fluff.
It doesn’t have to be perfect, and I promise, regardless of imperfections, these brownies are going to taste amazing.
The crispy topping is just three easy ingredients:
- peanut butter
- chocolate chips
- crisp rice cereal
Melt the peanut butter and chocolate together and stir in the rice krispies. Stir gently so the rice cereal doesn’t disintegrate – but if the PB/chocolate mixture is warm enough, this is a very easy process.
Pile that glorious concoction on top of the marshmallow fluff and use an offset spatula to spread into an even layer.
I like to gently press on the top of this chocolatey cereal layer once it’s spread evenly to compress it just every so slightly.
It should be relatively smooth. As smooth as a rice krispie layer can be.
Killer Crunch Brownies
Once you experience these killer crunch brownies, I’m just warning you that it’s hard to go back to every day brownies again.
They are unique and just different enough to be super appealing…while not being so *out there* that they make people feel uncomfortable (you know what I mean?).
Every time I make these for a potluck or gathering, they are one of the first things to go. They are a showstopper and rightly so. They taste even more amazing than they look!
Recipe originally posted Dec 2012; updated March 2021 with new pictures, recipe notes, etc.