Step 1

Grate the White Cheddar cheese and set it aside to let it come to room temperature. Toss in 1 Tablespoon of flour to help it melt smoothly into the white sauce.

Step 2

Combine the half and half, white wine, Worcestershire sauce, dry mustard, pepper, and mayo or sour cream.

Step 3

Set aside until you put the mushrooms in the oven.

Step 4

Heat the mixture in a double boiler over simmering water for 20 minutes. (You can create a makeshift one at home by setting a metal or glass bowl over a small saucepan.)

Step 5

Gradually sprinkle in the grated cheddar and stir until well combined. Remove from heat.

Step 6

For Serving: You can spread the sauce onto a serving plate and add the mushrooms on top, (Longhorn Style), or you can lightly drizzle the sauce over the mushrooms prior to serving. You can also pour the sauce into ramekins and offer it as a dipping option with the mushrooms. Just include forks if you choose this option.

Step 7

Preheat the oven to 375 degrees F.

Step 8

Wipe the mushrooms with a damp paper towel to remove any dirt.

Step 9

Use a pairing knife to trace around the stem, then gently pull it out. (Dice and freeze the stems for homemade stock!)

Step 10

Stuff each mushroom with the herb pub cheese until it’s almost to the top.

Step 11

Combine the grated Parmesan, roughly chopped Provolone, and half and half. Microwave for 25 seconds, then stir in the panko. Let it cool.

Step 12

The cheese mixture will harden but this makes it easier to top the mushrooms with it. Use your hands to evenly top each mushroom with the mixture.

Step 13

Pro Tip: Be careful not to over-stuff them. The filling can bubble up slightly as it bakes and you don't want the filling to overflow onto the baking sheet.

Step 14

Place the mushrooms on a foil or parchment paper lined baking sheet.

Step 15

Bake for 15 minutes or so, until the tops are golden and the bottoms are still firm enough to hold their shape. Halfway through, the mushrooms in the middle of the pan may need to be rotated with ones on the outside for even browning.

Step 16

Let the mushrooms sit for 5 minutes prior to serving. This allows them to firm up but also to cool slightly as they get very hot on the inside.