Creating Fluffy Cheesy Garlic Bread is a straightforward process that yields delicious results. Follow these steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Bread: Slice the loaf of bread in half lengthwise, ensuring not to cut all the way through, so it remains connected.
3. Make Garlic Butter: In a medium bowl, combine the softened butter, minced garlic, chopped parsley, salt, and black pepper. Mix until well combined.
4. Spread Butter: Generously spread the garlic butter mixture on the cut sides of the bread.
5. Add Cheese: Sprinkle the shredded mozzarella and grated Parmesan cheese evenly over the buttered sides.
6. Wrap in Foil: Wrap the bread halves in aluminum foil to keep it moist during baking.
7. Bake: Place the wrapped bread in the preheated oven and bake for 20 minutes.
8. Unwrap and Broil: After 20 minutes, carefully unwrap the foil and switch the oven to broil. Broil for an additional 5-7 minutes, or until the cheese is bubbly and golden brown.
9. Cool and Slice: Remove from the oven and let it cool slightly. Slice into pieces for serving.

These steps will guide you in creating fluffy, cheesy, and garlicky perfection with ease.