Pound steaks to half-inch thickness using the mallet.
Season both sides with salt and pepper generously.
Let them sit at room temperature briefly.
This helps them cook evenly throughout.
Heat butter and oil in your skillet.
Cook steaks for 3 minutes per side.
They should be medium-rare and juicy inside.
Remove steaks and keep them warm nearby.
Add shallots to the same hot pan.
Cook them for about one minute only.
Add mushrooms and cook until they're golden brown.
This takes around 4 minutes of cooking.
Pour in the brandy very carefully now.
Let it cook for 30 seconds quickly.
Add Worcestershire sauce and Dijon mustard next.
Stir everything together until it's well mixed.
Pour the heavy cream into your pan.
Let it simmer and thicken for 3 minutes.
Stir occasionally to prevent any burning issues.
Taste and adjust your salt and pepper.
Return the steaks to your creamy sauce.
Spoon sauce over the top generously too.
Cook for just one more minute together.
Garnish with fresh parsley before serving immediately.