Preheat your oven to 375°F. While waiting for the oven to heat up, rinse and dry your mushrooms thoroughly. Next, delicately remove the stems from the mushroom caps and gently scrape out the gills using a spoon. This creates more space for our flavorful filling.

Let's now move on to preparing the filling. In a mixing bowl, combine panko breadcrumbs with pub cheese and half-and-half. Stir until you achieve a well-combined and creamy texture.

It's time to give our mushrooms their signature look! Place the prepared mushroom caps on a lined baking sheet. Fill each cap generously with the filling mixture, packing it in snugly for maximum flavor infusion while cooking. To elevate the taste, top each mushroom with a slice of provolone cheese and a sprinkle of parmesan.

Bake your stuffed mushrooms for 18-20 minutes, or until the filling is bubbling and the mushroom caps are cooked to perfection. If you prefer a golden brown topping, simply broil for an additional 2-3 minutes after baking.

The final and most delicious step - serving and enjoying your Longhorn Stuffed Mushrooms!