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Lemon Square Protein Cake

10 mins
40 mins

For the Cake
1 cup All-purpose flour + 2 tbsp All-purpose flour
1 heaping scoop unflavored protein powder
1 tsp baking soda
1 tsp salt
½ cup cane sugar 
¼ cup monk fruit or erythritol 
½ cup lemon juice 
½ cup water 
1 tsp apple cider vinegar 
3 tsp olive oil
2 tbsp unsweetened applesauce 
½ tsp lemon extract
½ tsp vanilla extract 

For the Frosting 
300g plain Greek yogurt
25g sugar-free vanilla Jell-o pudding powder
½ tsp lemon extract 


  1. Preheat the oven to 350F.
  2. Combine and mix the dry ingredients.
  3. In a separate bowl mix the wet ingredient until combined.
  4. Fold the wet ingredients into the dry mix until the batter forms.
  5. Pour into greased parchment paper pan and bake for 25-27 minutes.
  6. While baking, prepare your frosting by combining all ingredients in a bowl and refrigerating for at minimum 1 hour.
  7. When baking is complete, allow cake to fully cool before you begin frosting.
  8. Serve and enjoy!