1. To begin, ensure that the mushroom slices are properly dried before breading. Gently pat them with paper towels to remove any excess moisture.

2. Next, set up your breading station. In one bowl, mix together the all-purpose flour, garlic powder, onion powder, paprika, salt, and pepper. In a second bowl, beat the eggs. And in a third bowl, add the breadcrumbs.

3. To bread the mushrooms, dredge them in the seasoned flour mixture, then dip into the beaten eggs, allowing any excess to drip off. Finally, roll in the breadcrumbs, pressing gently to help the coating adhere.

4. For an extra-crispy texture, try a double-dredging method: Dip in flour, then eggs, and then breadcrumbs once more.

5. Heat vegetable oil in a large skillet over medium heat until it reaches around 350°F.

6. Fry the mushrooms in batches for 3-4 minutes per batch until crispy and cooked through. Drain on paper towels and season with additional salt if desired.

7. While frying, combine ranch dressing with fresh parsley and lemon juice in a small bowl. Stir until well combined.