Best Sausage Gravy

Ingredients

• 1/4 teaspoon garlic powder
• 1 teaspoon black pepper, more to taste
• 3 cups milk
• 1/4 teaspoon seasoned salt
• 1/4 teaspoon salt, more to taste
• 1 pound ground pork breakfast sausage
• 2 tablespoons butter
• 1/3 cup all-purpose flour