Preheat oven to 350°F (175°C) and generously coat a 24-cup mini muffin tin with non-stick cooking spray.
In a medium mixing bowl, whisk together the high-protein pancake mix, water or milk, egg, and maple syrup until the batter is smooth with minimal lumps.
Spoon the batter into the prepared mini muffin cups, filling each approximately 3/4 full.
Place one piece of sliced sausage into the center of each muffin cup, pressing down slightly so the batter partially surrounds the sausage.
Bake for 12 to 15 minutes, or until the muffins are golden brown and a toothpick inserted into the cake portion comes out clean.
Remove from the oven and allow to cool in the pan for 5 minutes before transferring to a wire rack or serving.