Preheat your oven to 170°C / 350°F and line a baking tray or baking dish with parchment paper. This helps prevent the cinnamon rolls from sticking while also making cleanup much easier later. Allow the oven to fully preheat before baking so the rolls cook evenly and develop a soft, fluffy texture.

In a large mixing bowl, add the all-purpose flour, baking powder, salt, sweetener, vanilla whey protein powder, and cinnamon. Whisk everything together thoroughly so the ingredients are evenly distributed throughout the dough. Proper mixing at this stage helps avoid clumps of protein powder and ensures every bite has balanced flavor.

Add the Greek yogurt to the dry ingredients and begin mixing gently using a spoon or spatula. Continue stirring until a thick dough starts to form. Once the mixture becomes difficult to stir, use your hands to lightly knead the dough just until everything comes together. Avoid overmixing, as this can make the cinnamon rolls dense instead of soft and tender.

Check the dough texture before rolling. If the dough feels too sticky and difficult to handle, lightly dust it with a small amount of flour. If it feels dry or crumbly, add a spoonful of Greek yogurt and mix gently until the dough becomes smooth and workable. The dough should feel soft, slightly tacky, but easy to shape.

Lightly flour a clean countertop or work surface and transfer the dough onto it. Sprinkle a little flour over the rolling pin as well to prevent sticking. Roll the dough into a large rectangle about ¼-inch thick. Try to keep the thickness even throughout so the cinnamon rolls bake uniformly.

In a separate small bowl, prepare the cinnamon filling by combining the vanilla whey protein powder, cinnamon, sweetener, and almond milk. Stir until the mixture becomes smooth, creamy, and spreadable. Add the almond milk gradually so the filling does not become too thin or runny.

Using a spatula or the back of a spoon, spread the cinnamon filling evenly over the rolled dough. Make sure to spread it all the way to the edges so every bite is packed with sweet cinnamon flavor. Try to keep the layer even for consistent rolls.

Starting from one of the longer edges, carefully roll the dough tightly into a log shape. Roll slowly and firmly so the filling stays inside while creating those classic cinnamon roll layers. Once fully rolled, gently pinch the seam closed if needed.

Using a sharp knife or unflavored dental floss, slice the dough log into 8 equal cinnamon rolls. If using floss, slide it under the log, cross the ends over the top, and pull tightly for cleaner cuts without squishing the rolls.

Arrange the cinnamon rolls onto the prepared baking tray, leaving a little space between each one because they will expand while baking. Spacing them slightly apart allows heat to circulate evenly while still keeping the rolls soft and fluffy around the edges.

Place the tray into the preheated oven and bake for 20–22 minutes or until the rolls look lightly golden on top and fully cooked through. Keep a close eye on them during the final few minutes because protein-based dough can dry out quickly if overbaked.

While the cinnamon rolls are baking, prepare the creamy frosting. In a medium bowl, combine the Greek yogurt, vanilla whey protein powder, cinnamon or gingerbread spice, sweetener if desired, and almond milk. Whisk everything together until the frosting becomes smooth, creamy, and easy to spread. If it feels too thick, add a tiny splash of almond milk until you reach the desired consistency.

Once the cinnamon rolls are finished baking, remove them from the oven and allow them to cool for about 5 minutes. This short cooling time helps the frosting stay creamy on top instead of completely melting off the warm rolls.

Spread the creamy frosting generously over the warm cinnamon rolls, allowing it to melt slightly into the swirls and layers for extra flavor and moisture. Sprinkle a little extra cinnamon on top if desired for a bakery-style finish.

Serve the cinnamon rolls warm for the best soft, fluffy, and gooey texture. Enjoy them fresh out of the oven as a cozy high-protein breakfast, post-workout snack, or healthier dessert option.