Sweet Potato Protein Brownie Recipe

Sweet Potato Protein Brownie Recipe

Would you believe me if I told you that these gorgeous chocolate brownies are actually good for you?!


These chocolate brownies are packed with protein, soluble fibre, antioxidants and vitamin A.


Protein Brownies with Sweet Potato


They also taste AMAZING and are very diet and weight loss friendly at only 100 calories a piece. Oh and don’t get put off by the secret ingredient.. the humble sweet potato! 😉


Protein Brownies with Sweet Potato

Protein Brownies with Sweet Potato


1 vote


Sweet Potato Protein Brownies


  • 400g (2 medium) sweet potatoes
  • 100g dark chocolate chips
  • 2 heaped tbsp (20g) oats
  • 1 scoop chocolate protein powder
  • 3 egg whites
  • 1 tsp honey/agave nectar/freedom
  • 1/2 tsp cinnamon
  • 1/2 tsp baking powder
  • 1/2 tsp rapeseed or coconut oil
  • Optional ingredients: 1 tsp coffee or cocoa, tsp orange zest, dried cranberries or raisins, chopped almonds or walnuts


  1. Pre-heat your oven to 180 degrees C (350 F or gas mark 4)
  2. Skin the potatoes, chop into chunks and cook in the microwave until soft (5-6 minutes)
  3. Either mash the sweet potatoes in a bowl or add into your food processor and blend until 'mushy'
  4. Add the chocolate protein powder, oats, cinnamon and baking powder and blend together
  5. Melt the chocolate and coconut oil together (in a microwave - stir every 20 seconds and make sure not to burn the chocolate) and add this to the blender along with the egg whites and honey before blending again. Then stir in any extra ingredients.
  6. Pour your mixture into a lined or greased baking tray (8" by 8") and bake for 30 minutes
  7. Allow to cool & slice in to 12 pieces.

Nutrition Facts

Amount Per Serving

Calories 100

% Daily Value

Total Fat 3 g


Total Carbohydrates 14 g


Protein 4 g


* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

*This blog post contains affiliate links. Please read my disclaimer page for more information and for my policy on using protein powders in recipes, gluten-free foods/baking and vegetarian/vegan recipes.

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  1. Eve Willett
    April 27, 2013 / 11:47 am

    Looks so yummy! your page is so informative and easy to follow. I am definatley having a go at making these, I will tweet a photo to you!

    • Nics Nutrition
      May 6, 2013 / 8:41 am

      Thank you Eve! Can’t wait 🙂 x

  2. Rebecca Greenaway
    April 29, 2013 / 2:17 pm

    These are amazing! I didn’t use as much sweet potatoes (I used 1 and a half). I also used coconut milk instead of the oil but they taste so yummy!!! I love how they are gluten free and wheat free, mostly because I’m coeliac and a health freak 😛 Deffo a must try for any choccy lovers out there.

    • Nics Nutrition
      April 29, 2013 / 7:37 pm

      Thanks for your comment Rebecca! Great tips 🙂 x

  3. Kristine
    May 10, 2013 / 7:12 pm

    These are lovely! Substituted the coconut oil with some sunflower oil and they came out delicious. I will endeavour to find some coconut oil though, as I think they’d taste even better then!

    • Nics Nutrition
      May 10, 2013 / 8:18 pm

      Hi Kristine! Thanks for letting me know- great to have an alternate option. My Protein sell coconut oil online if you’re interested! Nic x

    • Nics Nutrition
      June 2, 2013 / 3:46 pm

      Cheers Rach! I didn’t know that!! 🙂 x

  4. June 18, 2013 / 2:20 pm

    Loved the flavour of these (though might try without the cinnamon and add some chopped pecans next time) but they came out a bit flat! Should I have whisked the egg whites?! I can get LucyBee coconut oil in my local Sainsbury’s – my personal favourite is Viridian but it’s not so handy to buy.

    • Nics Nutrition
      June 18, 2013 / 6:57 pm

      Hey! I bought the Groovy Food company coconut oil from Waitrose if that helps – £7 I think! Love idea of adding pecans. Mmmmm if they came out a little flat I suppose a little baking powder could help things. Do let me know if you try it – although brownies are meant to be quite compact! I hope this helps! Nic x

  5. June 26, 2013 / 7:49 pm

    OH. MY. GOD.

    Ok so you’re looking at the recipe and feeling a bit dubious about the use of Sweet Potato, don’t be. These are amazing! Moist, chewy, tasty and healthy too. Seriously, make a batch and you’ll agree!

    I can’t stop raving about these today, thank you Nic!!!

    • Nics Nutrition
      June 26, 2013 / 8:10 pm

      Aw thanks Simon!! And cheers for the great pic on Twitter – I’ll be uploading it tomorrow – yours looked better than mine! So happy you like them 🙂 Thanks!! Nic x

  6. Karen
    July 14, 2013 / 11:23 am

    Great recipe! Added raisons and chopped nuts to mine, also a little less chocolate and then saved some to put on the top. Shared a picture on twitter and Instagram today that looked delicious, in the hope others may copy the recipe! thanks again

    • Nics Nutrition
      July 14, 2013 / 6:29 pm

      Thanks for your comment Karen! OMG your pic looked AMAZING!! I’ll be uploaing it soon. What a great idea putting chocolate on top!! Nic xx

  7. Dave
    August 28, 2013 / 7:33 pm

    I don’t have a sweet tooth and rarely ever eat any desserts or chocolate but was really intrigued by these given the fact they had sweet potato in! I’m trying to get more calories in my diet and struggling to find decent snacks, well I think that problem is solved with these, they taste awesome!

    I’ve added cranberries to mine so far but will try other fruits and nuts and even tempted to see if chilli might work for a bit of a kick?

    This site is awesome Nichola and already proving a great resource for me as I love cooking and trying new things! Keep the recipies coming and keep sharing on twitter!

    • August 28, 2013 / 7:51 pm

      Thank you so much for your lovely message Dave – that really does mean a lot!! 🙂 I love your suggestion of chilli = and dried fruit! Coffee too would go good – ooh the options are endless. Thank you for your support!

  8. Karen
    August 29, 2013 / 7:09 am

    Thanks for adding my picture to the collection on this website (2nd picture from the top)
    ..they still look as scrummy as they tasted

    • September 5, 2013 / 7:44 pm

      Your picture is GORGEOUS Karen!! Thank you so much! So glad you liked them 🙂 Nic xx

  9. Grainne
    August 30, 2013 / 9:20 pm

    Baked these yummy chocolate brownies for the family … Needless to say there wasn’t very many left! The brownies tasted delicious and the added walnuts and raisins really complemented the recipe! Healthy, tasty and a great treat to have during the day without feeling guilty after!:) xo

    • August 31, 2013 / 8:51 am

      Hurray! I love it how they taste amazing yet are packed with goodness! Thank you for your picture and lovely comment 🙂 xx

  10. Mandy
    September 17, 2013 / 8:54 am

    I made these last night, wow they are gorgeous! I made a brownie cake as I had left my baking tray in my mums house and it still turned out great. For the dark chocilate I used a few sqaures of the Green and Blacks Maya Gold which added a lovley warm spicy flavour. I also used drinking chocolate powder instead of the protein powder.
    Thank you so much for all your amazing recipe’s, my only trouble is what to try next!

    • September 17, 2013 / 4:36 pm

      Aw thank you Mandy!! I’l upload your fab pic too – love your idea of hot choc powder – I’ll add that into the recipe. Thank you!! Nic xx P.s can’t wait to see what you make next!! xx

  11. rebecca lee davies
    October 2, 2013 / 4:19 pm

    I made these this morning for the first time, I love the recipe and so simple to make. I’m a cakeaholic trying to give up, these make the perfect substitute. I can’t taste the sweet potato what so ever. I’ll be interested to see the difference in the chick pea ones. They’re next on the list along with the over night oats. Love this web sight. Going to make my way through each fab recipe. Keep them coming

    • October 3, 2013 / 3:08 pm

      Aw thanks Rebecca! What a lovely comment! Thanks for your lovely pic too, I’ll be sure to upload it! Nic xx

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  13. Janine
    November 12, 2013 / 10:10 pm

    These brownies are simply a-mazing!! I’d been craving chocolate and didn’t want to have anything naughty, so I made these, sooo yummy! Thank you Nic, your recipes are fab and helping me stay on track xx

    • November 13, 2013 / 6:12 pm

      Hurray! Aw that’s so good to hear. Thank you for the lovely feedback Janine! xx

  14. Barbara-Anne
    November 20, 2013 / 3:18 pm

    Hi Nic, have you tried freezing these brownies? I wonder if you could make in advance for Xmas? X

    • November 22, 2013 / 6:03 pm

      Hello! Yes I have.. why don’t you do a batch-free-defrost test to see?! They are so yummy you can have them guilt free before xmas too 🙂 xx

  15. Abigail
    December 20, 2013 / 5:18 pm

    Hi Nic, can I make these without egg white or is there an alternative?? I have issues with egg white, but am fine with egg yolks – would egg yolk be okay?
    Thanks for all the fab recipes x

    • December 20, 2013 / 9:48 pm

      Hello! Yes I’m sure egg yolk would be ok – or you could use chia seeds mixed with water for a ‘binding agent’! xx

  16. Zoe
    January 8, 2014 / 11:09 pm

    Hi Nic!
    Love these protein brownies, really want to try them!
    What whey powder do you recommend? What is better.. whey concentrate and whey isolate?

    Sorry for all the questions, just want to make sure I’m not putting anything into my body that it cannot digest easily!

    P.S. I’ve just sent off my UCAS application to study Dietetics, hope i get in!! You are a great Dietitian role model for me, thanks 🙂

    • January 9, 2014 / 5:58 pm

      Aw thanks Zoe! I use Purition (whey), Sativa (plant protein) or MyProtein (whey) – there’s a full review under ‘reviews’ of Purition and Sativa plus a promo code so you know! xx

  17. Oliver
    April 10, 2014 / 4:09 pm

    By far the best healthy brownie recipe out there – they taste too good to be true!!!!! Everybody must try these bad boys

  18. Mimi
    June 1, 2014 / 2:42 pm

    Made them today, my god they are delicious!
    Your recipes never disappoint!

  19. Maeve
    August 9, 2014 / 3:55 pm

    Made these brownies today, they are too nice! Keep up the good work Nic, am loving trying (and eating) all of these recipes 🙂 🙂

  20. Sahar
    December 5, 2014 / 3:28 am

    I made this today and OMG they were so good:)))))) just wanted to say thank u for the recipe ! I’m on a diet and have been looking for a healthy afternoon sweet with my tea and these we’re PERFECT!!

    • December 5, 2014 / 10:08 am

      Aw thanks Sahar! That’s great to hear 🙂 Thanks for your comment! xx

  21. Manon
    August 30, 2015 / 4:25 pm

    These are amazing! <3 I didn't have any protein / milk powder, so I used 2 Options hot chocolate sachets instead!

    • August 30, 2015 / 8:19 pm

      Ooh fab!! Thank you so much for letting me know Manon! xx

  22. Vera
    March 31, 2016 / 8:20 pm

    i’m baking these sweet potato brownies as we speak. I tasted the batter and it’s OUT OF THIS WORLD!!!! absolutely Delicious!!! You are a genius!! 🙂
    Thanks for a perfect recipe!!

  23. Victoria
    May 2, 2019 / 7:27 pm

    I love these !!! I just made them they taste amazing! One question ☺️ Do I need to keep them in fridge or I can leave it out ? Thank you

    • May 29, 2019 / 1:19 pm

      Hello! I would keep them in the fridge 🙂

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