Chocolate Protein Cake with Vanilla Protein Frosting

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In an attempt to Christmas shop for others, I paid a visit to the kitchen shop and ended up buying a cake nozzle and a cooking ring for… myself errr… yeah <:-] See, I don’t know much about decorating cakes but I figured it can’t be THAT hard to learn? Cake nozzles are super cheap and you can just cut a hole through a ziplock and add the nozzle to the hole and boom, you have a proper cake pipe that allows you to decorate your cake like a pro! I don’t know about you, but I think when cakes look really nice, for some reason they end up tasting even better, hehe (insert something here about consuming aesthetics.) This recipe started out as a “hmmmmm what am I doing here?” because I basically just added the first two ingredients to my mixing bowl unsure about what I would end up making. After I added the third ingredient though, its fate was sealed: it was to become a protein cake ;-)

Cake Ingredients

1/2 cup greek yogurt (Total 0%)
3/4 cup liquid egg whites
1/2 cup adzuki beans (or black beans – always canned and unslated though)
3/4 cup chocolate whey protein
1 tablespoon cocoa
1/8 cup vanilla whey protein
1 small banana
1/4 cup pea protein (I wanted to use coconut flour but I ran out so consider using that instead)
1 tablespoon fitness fiber (or psyllium husks)
1/8 cup quinoa flakes (or oats)
3/8 cup nuts and seeds (optional)


Blended together and baked at 180 C (356 F) for ~ 30 minutes on a round cake mould.

Frosting Ingredients:

1/2 cup  vanilla casein
1/2 cup Greek yogurt (same as above)
3 tablespoons water


Just blended together and added to a ziplock back with the nozzle at the end:

Macros per Serving (out of 4 w/ frosting): 

26g protein
17g carbos (3.4g sugars/4.5g fiber)
3.5g fat (0.5g sat) 

Now, the above yielded a cake that was a LOT bigger than the cake I ended up frosting. This is because, after I baked it, I decided I wanted to use the baking ring to cut out a perfect circle so, I did this and just ate the sides in situ :-) Let me describe the final product though, let’s see… AAAA! It was delicious!

The filling is super soft and almost creamy because of the greek yogurt + adzuki beans (you can see what I mean when you click on the naked cake picture above). And the frosting? Well, ho, ho, ho! This is BY FAR my favorite frosting because a. it’s super easy b. it’s super high in protein and c. it’s super taaasty!!! I hope to improve with the cake nozzle so that the frosting looks nicer but yeah, fun, no?

Moral of the post: buy a cake nozzle and a cooking ring!!! Super cheap and ooo, la, la, la :-)))))))))))))))))))))))))))))))))))))))))))

  • ChocChilliMango

    Looks really good!
    Might be worth including what size pans you bake stuff in for readers. Using different sizes will drastically affect the end result :))

  • Antti

    How do you make the frosting, just with a hand mixer?

  • Anna


  • Anna

    I’ve edited the post to clarify, thanks Antti :-)

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Anna Sward is the creator of Protein Pow – the world’s number one resource for protein powder recipes. Anna is the world’s leading expert on protein powder-based cooking. Her recipes have been featured in several leading magazines and she is a columnist and feature writer at, Muscle & Fitness magazine. Anna regularly hosts cooking workshops with professional athletes and members of the general public. She is the author of The Ultimate Protein Powder Cookbook and creator of the Protein Pow App.

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