Preheat the oven to 375°F (190°C). Lightly spray a 9×13 inch baking dish with non-stick cooking spray.
Layer the base: Roll out one can of crescent rolls in the bottom of the baking dish, pressing any seams together to form an even layer.
Add the filling: Layer the deli-sliced roast beef evenly over the dough, followed by a sprinkling of Swiss cheese.
Prepare the sauce: In a small bowl, mix the dry onion soup mix, melted butter, Worcestershire sauce, and garlic powder. Drizzle this mixture over the cheese layer.
Top with dough: Roll out the second can of crescent rolls and place it over the beef and cheese, pinching the seams together to create a smooth top layer.
Bake: Place the dish in the oven and bake for 15-20 minutes, or until the crescent rolls are golden brown and fully cooked.
Heat the broth: While the squares are baking, warm the beef broth in a small pot over medium heat to serve as your dipping sauce.
Cool and cut: Let the French Dip Squares cool slightly after baking, then cut into squares.
Serve: Serve the squares with the warmed beef broth for dipping and enjoy!
