Preheat oven to 450 degrees F. Line a baking sheet with parchment paper or a silicone baking mat; set aside.

Heat olive oil in a large skillet over medium heat. Add sausage and cook until browned, about 5-8 minutes, making sure to crumble the sausage as it cooks. Drain excess fat; transfer sausage to a paper towel-lined plate.

In a large bowl, combine sausage, flour, cheese, green onion, baking powder, salt, baking soda and pepper.

Grate butter using the large holes of a box grater. Stir into the flour mixture.

In a small bowl, whisk together buttermilk and heavy whipping cream.

Add buttermilk mixture into the flour mixture and stir using a rubber spatula until a soft dough forms. Working on a lightly floured surface, knead the dough 3-4 times until it comes together. Using a rolling pin, roll the dough into a 1-inch thick rectangle. Using a sharp knife, cut out 12 squares. Place biscuits onto the prepared baking sheet; place in the freezer for 15 minutes.

Remove biscuits from freezer. Place into oven and bake for 15-18 minutes, or until golden brown.

Serve warm.