In a medium bowl, combine Bisquick and protein powder, mixing thoroughly. Gradually pour in skim milk and optional maple extract, stirring until smooth. Let rest for a few minutes.

Preheat a non-stick skillet over medium heat and lightly grease it with cooking spray. Pour batter into the skillet to form small circles. Cook for 2 minutes until edges bubble; flip and cook for another 1-2 minutes.

In a separate bowl, whisk the eggs until combined. Heat another skillet over medium-low heat, adding a touch of spray. Pour in eggs, swirling to create a square shape. Cook until set, then fold into a rectangle.

Layer the cooked folded eggs between two pancake buns, adding your choice of protein like turkey bacon or chicken sausage. Serve warm.