Preheat oven to 350F and spray a muffin pan with nonstick spray. Set aside.
Add sausage to a skillet over medium-high heat. Using a spatula or spoon to break apart the ground sausage, cook the sausage until browned, stirring often.
While sausage cooks, combine Bisquick and garlic powder in a large mixing bowl.
Once cooked through, use a spatula or slotted spoon to remove the sausage pieces to a paper towel-lined plate to drain and cool for a few minutes.
While the sausage is draining, add beaten eggs and 1 cup of shredded cheese to the Bisquick mixture in the mixing bowl. Stir together until well-combined.
Add the cooked sausage to the mixture, stirring just until combined.
Divide the mixture between the wells of a greased muffin pan (I use a large cookie scoop for this). Sprinkle the remaining 1/2 cup of shredded cheese over the tops of the batter.
Bake in preheated oven for 20 minutes. Serve warm.
Notes
Feel free to use the variety of breakfast sausage that you prefer--mild, medium, spicy, etc.
I prefer to buy a block of cheese and shred it, but you can use pre-packaged shreds if you're short on time.
Leftovers can be stored in an airtight container in the refrigerator.