Preheat oven to 400°F (200°C) and grease a mini-muffin tin or line a baking sheet with parchment paper.
Brown the breakfast sausage in a skillet over medium-high heat until fully cooked and crumbled; drain excess grease.
In a large mixing bowl, combine the cooked sausage, thawed hashbrowns, cheddar cheese, onion, flour, egg, salt, pepper, and garlic powder.
Incorporate the mixture thoroughly until the egg and flour bind the ingredients.
Scoop approximately 2 tablespoons of the mixture for each bite, compressing firmly into 1-inch balls.
Arrange the bites on the prepared baking sheet or press into the mini-muffin tin slots.
Bake for 20 to 25 minutes until the bites are golden brown and reach a crispy exterior texture.
Allow the bites to rest for 5 minutes on the pan to set before serving.