Preheat the oven to 375°F. Spray 14 regular sized muffin cups with cooking spray.
In a skillet on the stove top brown the sausage over medium-high heat for 8-10 minutes or until no pink remains. Drain any excess fat from the pan.
Meanwhile, in a medium mixing bowl, mix together the crumbled sausage, baking mix, 1 1/2 cups shredded cheese, chopped green onions and seasonings. Mix well.
In a separate bowl, whisk together the soup and buttermilk until no lumps are visible. Add to the dry ingredients. Mix until thoroughly moistened.
Divide the mixture evenly among the muffin cups and sprinkle the remaining 1/2 cup of cheese cheese on top.
Bake for 22-25 minutes until lightly golden. Serve immediately.