01 -
Ensure butter is completely softened at room temperature for about an hour or microwave in short bursts until pliable but not melted.
02 -
In a medium bowl, thoroughly combine softened butter, minced garlic, all chopped herbs, dried thyme, and red pepper flakes if using. Season generously with salt and freshly ground black pepper, then taste and adjust seasonings as needed.
03 -
Preheat oven to 190°C (375°F).
04 -
Slice the bread lengthwise into two halves. Optionally, score the bread surface with shallow diagonal cuts, being careful not to slice completely through.
05 -
Spread the herb-garlic butter mixture evenly over the cut sides of both bread halves. Sprinkle the grated Parmesan cheese evenly over the butter, followed by an even layer of shredded mozzarella. Optionally, drizzle lightly with olive oil.
06 -
Place both bread halves on a baking sheet and bake for 12-15 minutes, until cheese is melted, bubbly, and lightly golden. For extra browning, broil for the final 1-2 minutes, watching carefully to prevent burning.
07 -
Remove from oven and let cool slightly for 2-3 minutes before slicing into individual portions. Serve immediately while still warm.