Protein Slice Birthday Cake

My partner isn’t a huge fan of sweets, so there’s no point getting him a birthday cake because I end up eating it all! A few years ago I started making him protein slice and balls to save the $5 per bar that he was spending on these pre and post gym snacks. Using his most basic of protein powders, pure whey protein, and fine quality chocolate, healthy seeds, and nuts this slice is a complete meal or a quick snack. So when his birthday rolled around, I just whipped up a version in a cake tin and ‘iced’ it with chocolate, sprinkles, coffee beans… and love.

Please note, this recipe makes a dry slice, not gooey like those which contain dates and dried fruits. We will add a separate recipe for that soon :)

Protein Slice Birthday Cake Protein Slice Birthday Cake with melted chocolate poured over the top and swirled with a spoon so it drips over the edges



  • 200 grams dark chocolate
  • 1.5 cups wheat germ or oatmeal
  • 2/3 cup peanut butter
  • 1/2 cup chia seeds
  • 1/2 cup sunflower seeds
  • 1 cup mixed premium nuts (any mix of pistachio, almond, cashew, pecan or walnut)
  • 8 scoops protein powder (not a carb based powder, just protein)
  • 1/2 cup honey
  • 1/2 cup apple juice or almond or soy milk
  • 100 grams chocolate separate for topping


Protein Slice Birthday Cake

Protein Slice Birthday Cake



  • Melt chocolate in a stainless steel bowl over a water bath with peanut butter and honey
  • Add apple juice or milk and whisk to emulsify
  • Add dry ingredients gradually, using your hands to combine the dry with the wet. The mixture should hold when pressed into a tight ball
  • Line a cake tin with baking paper
  • Press mixture into cake tin, pushing firmly over the surface to compact the ingredients together. If you think you’ve pressed it enough, press over the entire surface again with the back of a spoon
  • Refrigerate, preferably overnight. Remove from cake tin and remove baking paper, place on the tray or plate you intend to serve on
  • Sit for an hour to bring to room temperature
  • Melt 100 grams of chocolate then pour in the centre of the cake
  • Use the back of a spoon to swirl the chocolate in circles from the centre, pushing it towards the edges and creating a texture of circles on the setting chocolate
  • Before the chocolate sets, decorate with sprinkles, nuts, coffee beans, berries or seeds of your choice
  • I cheated and used one of those glitter pens to write the message, but you can use any kind of icing or white/coloured chocolate


Add candles and serve with a song!

PS, this recipe also works great in a regular slice tin without the birthday extras

Author: admin

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