In a mug add the protein powder, and then stir in the baking powder and cocoa powder. Next add the flav drops if using them.
Add the egg and half the milk and give it a really good stir until it forms a thick cake batter. Add the remaining milk bit by bit whilst stirring until you get a pretty thick but smooth consistency. Ensure you really get all the bits of powder incorporated, particularly in the bottom edges of the mug.
Clean the edges of the inner rim of the mug using your finger, this ensures the cake rises more evenly.
Microwave on high for just over a minute until it has risen about 1 inch over the mugs edge. It's key that you don't over microwave it, as otherwise the texture won't be soft in the centre but firm.
Remove and squirt over some chocolate syrup and then add a dollop of protein chocolate spread. Eat immediately and enjoy!
