Protein Rice Krispies No Marshmallows - Peanut Butter

Protein rice krispies no marshmallows - 14g of protein, 154 calories, with a peanut butter flavor and chocolate ganache on top. No sticky marshmallow mess, no sugar crash, and honestly way more satisfying than the original.

These protein rice krispies no marshmallows came out of a very specific moment. I had a new peanut butter protein powder from Scoops that I genuinely wanted to highlight, not just toss into a smoothie. Rice krispie treats felt like the right vehicle because the base is simple enough that the protein powder flavor actually comes through. And NGL, I had a nostalgic craving for the original childhood version too.  

P.S. This makes a great after-school snack or healthy dessert for kids too.

It took three rounds of testing to get the ratio right though. Batch one was so thick the bars were just wayyyy to chewy when biting through. Batch two was so runny the cereal went soggy in seconds when I added it to the bowl. Batch three was exactly what I wanted, and the single biggest thing I learned is that you have to move FAST when the cereal hits the bowl. The cereal soaks up moisture almost immediately. I built that into the instructions below so you don't have to learn it the hard way like I did.

And if you're the type who loves a no bake option on rotation, my protein bars and balls section has a lot more where this came from.

Ingredients for Peanut Butter Protein Rice Krispie Treats No Marshmallows

You're working in two parts here: the peanut butter base and the chocolate ganache. Neither one is complicated, but the ingredients are worth talking about.

For the base:

• Rice Krispies Cereal - the base. Use name brand or a store generic, it doesn't matter.. Measure loosely; packing it down throws off the cereal-to-binder ratio.
  • Sub: Any crisped rice cereal, or a certified gluten free one if that matters.
• Peanut Butter Powder to add extra peanut butter flavor and help thicken the base without adding a lot of fat. I use PB2 or PbFit.
  • Sub: More creamy peanut butter, but start with only half the amount of water.
• Peanut Butter Flavor Protein Powder which is what prompted this recipe. I used the one from Scoops, but Quest makes one too.
  • Sub: ½ cup vanilla protein powder + ¼ cup peanut butter powder. Amounts are in the recipe card.
• Vanilla Protein Powder rounds out the flavor so it isn't only peanut. I use Quest, because whey-casein stays soft in a no-bake bar where isolate goes chalky.
  • Sub: Plant based vanilla protein works, but add a pinch of stevia and a splash of vanilla extract to cut the earthy flavor.
• Unflavored Collagen - this is optional but it adds a couple extra grams of protein and gives the bars a slightly smoother bite. I use Vital Proteins.
  • Sub: Unflavored protein powder or leave it out entirely.
• Creamy Peanut Butter for binding and flavor richness without making the base greasy. I use American Dream Nut Butter, code HAYLSKITCHEN for a discount.
  • Sub: Almond butter, cashew butter, tahini or any nut or seed butter.
• Water to bring it together. Water rather than milk keeps calories down.

For the chocolate ganache:

• Sugar-free Chocolate Chips as the base of the topping. I use Lily's dark chocolate chips.
  • Sub: Regular chocolate chips work.
• Butter, a tiny amount, to keep the chocolate glossy and stop it setting brittle.
  • Sub: Coconut oil.
• Chocolate Protein Powder. Use a whey-casein blend like Quest since it blends easily into the melted chocolate while isolate could go grainy. My no bake protein blondies use whey-casein for the same reason.
  • Sub: Whey isolate protein, but start with ⅓ the amount of milk
• Unsweetened Cocoa deepens the chocolate so the protein powder isn't carrying it alone.
• Unsweetened Almond Milk thins the ganache to spreadable. Make sure it is at room temperature
  • Sub: Any non-dairy or regular milk works

How to Make High Protein Rice Krispie Treats Without Marshmallows

With no stovetop work needed, these peanut butter rice krispie treats are one of the quickest recipes out there!

1. Line the pan. Line an 8x8" pan with parchment paper or wax paper and leave an overhang on two sides so you can lift the whole slab out later.

2. Mix the base. In a large bowl, mix together the peanut butter powder, peanut butter protein powder, vanilla protein powder, collagen (if using), creamy peanut butter, and water. Stir until smooth and thick. It should be spreadable but not runny, and not so stiff it won't fold.

3. Add the cereal - FAST. Pour the rice krispies into the wet ingredients mix and fold everything together quickly. The cereal absorbs moisture almost immediately. If you're slow here, the cereal goes soggy before it hits the pan and you won't get that satisfying crunch in the final bar. This is the single most important step.

4. Press into the pan. Spread the mixture into the prepared pan and use the back of a spoon or a spatula to smooth it out evenly. Press it down firmly so the bars hold together when sliced.

5. Freeze the base. Pop the pan in the freezer for 15 minutes until the base is set and firm.

6. Make the chocolate ganache. Combine the sugar-free chocolate chips and butter in a microwave-safe bowl. Microwave for 40 seconds total, stopping to stir every 15 seconds. Once melted, set the bowl aside and let it cool for exactly 5 minutes. This cooling step matters because it thickens the chocolate before the protein powder goes in, which gives you a smoother ganache.

7. Whisk in the chocolate. Add the chocolate protein powder and cocoa powder directly to the melted chocolate. Then gradually whisk in the almond milk, just 1-2 tablespoons at a time. Whisk vigorously between each addition. The ganache will come together into something thick, smooth, and rich.

8. Spread and freeze again. Spread the ganache over the frozen base. Return the pan to the freezer for another 20 minutes.

9. Slice. Lift the slab out using the parchment overhang, place it on a cutting board, and slice with a sharp knife into 12 bars.

Tips for the Best Peanut Butter Protein Rice Crispy Treats

• Work fast with the cereal. I cannot stress this enough. The moment the rice krispies hit the wet mixture, the clock is running. Fold and get it into the pan quickly. Slow stirring equals soggy bars.
  
• If your base feels too thick before the cereal goes in, add water a teaspoon at a time. If it's too thin, add a spoonful of extra peanut butter powder. The texture should be peanut buttery and spreadable, like a thick batter.

• Taste the peanut butter mixture and add sweeteners like stevia if needed.

• Let the chocolate cool before adding powder. The 5-minute cooling window after melting the chips is not optional. Pouring protein powder into scorching hot chocolate causes it to seize and clump, and no amount of whisking will fix it after that.

• Add the almond milk gradually to the ganache. One to two tablespoons at a time, whisking hard after each addition. Too much liquid at once breaks the ganache and makes it runny instead of thick and spreadable.

• Slightly thaw before eating. These are stored frozen and meant to be eaten that way. Give them 5 minutes on the counter before biting in. Straight from the freezer they can be too hard.

My oreo peanut butter bars are another no bake dessert option worth bookmarking if you love the peanut butter flavor profile.

Storage

Freezer: Store the bars in an airtight container or a freezer-safe zipper bag for up to 3 months. Layer with parchment if stacking so they don't stick. Slightly thaw on the counter for about 5 minutes before eating.

Fridge: You can keep them in the refrigerator in an airtight container for up to 5 days, but they're softer this way. Still good, just a different softer texture.

Counter: Not recommended. The protein powder base softens at room temp and the ganache loses its firmness.

Variations

The base takes swaps well once you've got the binder right.

• Extra peanut butter: Drizzle warm peanut butter over the ganache before the final freeze.
• Salted: Flaky sea salt on the ganache before it sets cuts the sweetness.
• Almond butter: Swap both peanut butter ingredients for almond versions.
• No topping: Skip the ganache for a lighter bar and a faster recipe.

More No Bake Protein Bar Recipes You'll Love

• Healthy Samoa Protein Bars
• No Bake Freezer Brownies
• Peanut Butter Cup Protein Bars
• Caramel Fudge Protein Bars