01 -  Preheat the oven to 175°C. Line a 12-cup muffin tin with paper liners or lightly grease the wells. 
 02 -  In a large mixing bowl, whisk together the eggs, Greek yogurt, almond milk, applesauce, maple syrup, and vanilla extract until the mixture is well combined and smooth. 
 03 -  In a separate bowl, blend the oat flour, vanilla protein powder, coconut flour, baking powder, baking soda, and salt until evenly mixed. 
 04 -  Gradually fold the dry ingredients into the wet mixture until just incorporated. Avoid overmixing to ensure tender muffins. 
 05 -  In a small bowl, combine coconut sugar with ground cinnamon to create the swirl mixture. 
 06 -  Spoon batter to fill each muffin cup halfway. Sprinkle a portion of the cinnamon-sugar mixture over the batter, then top with the remaining batter. Swirl gently with a toothpick to create a marbled effect. 
 07 -  Bake for 18 to 22 minutes, or until a toothpick inserted into the center comes out clean. Allow muffins to cool in the tin for several minutes before transferring to a wire rack. 
 08 -  For a creamy topping, blend softened cream cheese, Greek yogurt, and maple syrup until smooth. Drizzle over cooled muffins before serving, if desired.