Preheat the oven to 350°F (175°C) and coat a 12-cup muffin tin with non-stick cooking spray.
In a large mixing bowl, whisk together the pancake mix, liquid egg whites, Greek yogurt, skim milk, and sugar-free maple syrup until the batter is smooth.
Gently fold the cooked sausage crumbles into the batter using a spatula.
Distribute the batter evenly among the 12 muffin cups, filling each approximately three-quarters full.
Bake for 18 to 20 minutes until the tops are golden brown and a toothpick inserted into the center comes out clean.
Remove the tin from the oven and allow the muffins to rest for 5 minutes before transferring to a cooling rack.
Serve immediately or store in an airtight container for up to 5 days.