Preheat oven to 375°F (190°C) and line a baking tray with parchment paper.
In a bowl, whisk together flour, whey protein powder, baking powder, and salt.
Add Greek yogurt and mix until a dough forms. Knead gently with your hands until smooth.
Roll the dough out to about ½ inch thickness on a lightly floured surface.
Brush the dough with melted butter. Sprinkle with brown sugar sweetener and cinnamon.
Cut into 10 cinnamon sticks and transfer to the baking tray.
Bake for 13 to 15 minutes until lightly golden.
In a separate bowl, mix protein powder, Greek yogurt, cream cheese, and powdered sweetener until smooth to make the icing.
Drizzle the icing over the warm cinnamon sticks and serve.
