Chocolate Peanut Butter Protein Bars
Who can say no to a decadent dessert with 10 grams of protein? These chocolate peanut butter protein bars will become your new favorite healthy snack.

I’m a dietitian and I LOVE sweets.
A lot of the time, I just serve myself a regular Oreo or Reese’s and call it a day. But I also love to keep better-for-me sweets on hand so when I want a treat that’s good for my body, I have the option available.
These chocolate peanut butter protein bars satisfy my sweet tooth and nourish my body. They’re incredibly tasty (my picky husband agrees), and yet, they’re rich in protein, healthy fats, fiber, and they’re super filling, too.
These easy protein bars are healthy but they don’t taste healthy, and I know you’ll love them!

Why you’ll love this recipe
High protein: Each bar contains 10 grams of protein to keep you full.
Healthy fats: The peanut butter and ground flaxseeds offer good-for-you fats to support your heart and health.
Lower sugar: These delicious bars are lightly sweetened with maple syrup and are much lower in sugar than your typical candy bar.
So delicious: These absolutely rival Reese’s cups. They have the PERFECT sweet and salty balance but they’re way more nutritious and balanced.
Super easy: Stir, cool, and slice. That’s all you need to do to make this incredible sweet snack!
Ingredient notes
Here’s what you’ll need to make these high protein chocolate peanut butter bars:
- Natural peanut butter — look for one where peanuts is the only ingredient
- Vanilla protein powder — don’t use unflavored here
- Powdered peanut butter — PB&Me and PB2 are popular brands
- Ground flaxseeds — golden roasted flaxseeds are my favorite, but use what you can find
- Maple syrup — sub honey or agave
- Salt
- Chocolate chips — feel free to use low sugar chocolate chips or dairy-free if needed
- Flakey salt — technically optional, but I wouldn’t recommend skipping this
How to make them
Line a loaf pan with parchment paper and set aside.

In a medium bowl, combine peanut butter, protein powder, peanut powder, flaxseeds, maple syrup, and salt. Mix together with a spoon or spatula until well-combined. The texture should resemble a thick cookie dough and should form a ball when pressed together.

Transfer the dough to your loaf pan.

Using your fingers or the back of a spoon, press it onto parchment paper until it forms an even layer covering the pan. Make it as flat as you can.

In a microwave safe dish, microwave chocolate chips in 30-second intervals. Stir between each interval to avoid burning. Microwave until the chocolate chips are just melted and smooth.
Pour the melted chocolate over the protein bars and use the back of a spoon to spread it in an even layer. Immediately top chocolate with sea salt and transfer to the fridge. Cool for at least 1 hour.

Remove the parchment paper and chocolate peanut butter protein bars from the fridge and slice into squares. Keep stored in a covered container in the fridge and enjoy!
Tips and tricks
- Make sure your natural peanut butter is fresh runny
- Don’t overpack the protein powder or ground flaxseed when measuring
- If the dough looks too dry, add an extra scoop of peanut butter
- If the dough looks too runny, add an extra scoop of protein powder
Products I used
- Vanilla whey protein powder
- Ground flaxseeds (this is the BEST brand and tastes so nutty)
- Peanut powder (any brand works)
- Flakey sea salt

How to store
Once your protein bars have cooled and the chocolate has set, slice into 10 squares.
Transfer to a large food container with a lid and store in the fridge for up to one week.
Chocolate peanut butter protein bars can also be frozen and defrosted in the fridge overnight.
Frequently asked questions
I like the vanilla whey protein powder from Leanfit, purchased at Costco. I also love the protein powders from Legion Athletics.
You can make these chocolate peanut butter protein bars vegan by using dairy-free chocolate chips and a plant-based vanilla protein powder.
You absolutely can! Just make sure whatever you’re using is unsweetened.
You can still use it! Simply omit the added salt that’s mixed in the dough. I’d still recommend topping your chocolate with flakey sea salt, though.
Unfortunately, whole flaxseeds will not work in this recipe.

Chocolate Peanut Butter Protein Bars
Ingredients
- 3/4 cup natural peanut butter
- 1/2 cup vanilla protein powder
- 1/4 cup peanut powder
- 1/4 cup ground flaxseeds
- 3 Tbsp maple syrup
- 1/2 tsp salt
chocolate topping
- 1/3 cup semi-sweet chocolate chips
- pinch flakey sea salt, optional
Equipment
- 1 loaf pan
Instructions
- Prepare pan: Line a loaf pan with parchment paper and set aside.
- Make dough: In a medium bowl, combine peanut butter, protein powder, peanut powder, flaxseeds, maple syrup, and salt. Mix together with a spoon or spatula until well-combined. The texture should resemble a thick cookie dough and should form a ball when pressed together.
- Add to pan: Transfer the dough to your loaf pan. Using your fingers or the back of a spoon, press it onto parchment paper until it forms an even layer covering the pan. Make it as flat as you can.
- Melt chocolate: In a microwave safe dish, microwave chocolate chips in 30-second intervals. Stir between each interval to avoid burning. Microwave until the chocolate chips are just melted and smooth.
- Pour chocolate: Pour the melted chocolate over the dough. Use the back of a spoon or a spatula to spread evenly over protein bars.
- Refrigerate: Immediately top chocolate with sea salt and transfer to the fridge. Cool for at least 1 hour.
- Slice: Remove the parchment paper and protein bars from the fridge and slice into squares. Keep stored in a covered container in the fridge and enjoy!
I made these today, and they are TO DIE FOR. Even my picky husband enjoyed them. So nice to have a sweet treat with some extra protein. I will make these again and again. Thanks for a great recipe!
Oh my gosh, I’m so glad you liked them!! Thanks so much for your comment and rating.
Soooooooo good! Absolutely delicious peanut buttery flavour and very satisfying. Going straight to the favourite recipe pile!
YAY I’m so glad you liked them!
These are next level!!!! The texture is so unique in the best way – almost like the inside of a Reese’s peanut butter cup. The taste is 10/10, and I feel good knowing that it is going to provide me with lots of energy! I was a bit short on peanut butter, so used about a tsp of melted coconut oil to help everything mix & didn’t have maple syrup, so used honey as a substitute – turned out just as great! I definitely recommend you give these a try 🙂
So glad you enjoyed!! Thank you so much for taking the time to leave a review!
Mmmm!
Super delicious, really hits the spot and easy to make. Ticks every single one of my boxes!!!! Thank you for a great recipe!
Thank YOU so much for your review!! I’m glad you like them.
I have made these 3 times now and they have quickly become my favorite evening treat! They are just as satisfying to me as a Reese’s peanut butter cup but I feel good about eating them because they are balanced and even have omega-3 fatty acids from the flaxseed! I always make them plant-based and my favorite protein powder to use is Truvani vanilla. I don’t know if it’s climate or the texture of my protein powder, but for best results I add about 1 Tbsp water to the dough and it comes out just right.
I made these today and it’s delicious!!! I added an extra layer of chocolate at the bottom to really make it feel like a Reese’s cup and WOW. I was not expecting this to actually compare to a Reese’s!! What a great option with a lot of protein.
As a picky eater, I am approving this recipe, haha!! It’s so so good! Even my picky husband enjoyed it. Love the extra boost of protein!
I’m so happy to hear this! Thanks so much for your review!
These were seriously so good. Super easy to make. Husband and I both loved them
I have made these more times than I can count. I used to buy the perfect bars because I loved the texture, but these are so much better and very similar in texture. Miranda does not miss with these recipes
Thank you so much, Alexi!!
Excited to try these! Is the nutritional info based on a single serving (if so how many servings are there?) or the whole recipe?? Thanks!
The nutrition information is for one bar, and one bar is 1/10 of the recipe! 🙂 But of course, you’re welcome to adjust the size to what suits you best. Hope you enjoy!
So yummy and easy to make! My boys loved them!
Omg so good!! Tastes just like a reeses cup but way healthier and higher protien! Perfect afternoon snack or for after a workout 🙂