Preheat your oven to 400°F.

In a mixing bowl, blend together the butter, garlic, parmesan, monterey jack, cheddar, and green onions until it forms a smooth mixture.

Cut the baguette in half lengthwise and generously spread the butter mixture on each half.

Place the bread on a baking sheet lined with parchment paper and bake for approximately 15 minutes, or until the cheese is bubbly and the edges are turning golden brown.

Once baked, let it cool slightly before slicing and serving.