Preheat oven to 400 degrees Fahrenheit (200 degrees Celsius) and line a baking sheet with parchment paper.

In a medium bowl, combine softened butter, mayonnaise, minced garlic, Parmesan, Mozzarella, and fresh parsley. Mix until fully smooth.

Spread the mixture evenly over the cut sides of the French bread halves.

Bake for 10 to 12 minutes until the edges are golden and the cheese is bubbly and slightly browned.

Slice into individual sticks and serve warm.