Start by preheating your oven to 400°F. This temperature is ideal for making the bread crisp on the outside while keeping it soft and chewy inside.
Cut the loaf of French bread lengthwise, creating two halves. Place the halves on a baking sheet, cut side up, so the bread can absorb all the delicious garlic butter.
In a small bowl, combine the softened butter, garlic powder, minced garlic, and Italian seasoning. Mix them together until the butter is fully infused with the seasonings.
Spread the garlic butter mixture evenly over both halves of the bread. Be generous with it to ensure every bite is flavorful. Then, top the butter with a mix of Colby Jack and mozzarella cheese.
Place the bread in the oven and bake for 12-15 minutes. The butter should melt completely, and the cheese should be bubbly and golden. For a crispy top, switch to the broil setting for an additional 1-2 minutes.