Preheat your oven to 375°F (190°C).

Line a baking sheet with parchment paper.

In a mixing bowl, combine the softened butter and minced garlic.

Add the chopped parsley, salt, black pepper, and red pepper flakes (if using) to the butter mixture.

Slice the Italian bread in half lengthwise.

Generously spread the garlic butter mixture over the cut sides of the bread.

Place the bread halves on the prepared baking sheet and bake for 10-15 minutes.

Remove from the oven, let cool for a minute, and cut into pieces.