01 -
Turn on your oven and let it heat up to 375°F (190°C).
02 -
Coat an 8x13 inch pan lightly with grease to prevent sticking.
03 -
Add the crab meat, lemon juice, bread crumbs, melted butter, ⅕ cup Parmesan cheese, mustard, horseradish, garlic powder, and onion powder into a mixing bowl. Stir really well.
04 -
Take a cookie scoop to fill each mushroom cap with the crab mixture.
05 -
Scatter the leftover grated Parmesan cheese across the tops of the filled mushrooms.
06 -
Pop the mushrooms in the oven until softened and tender, around 15 to 20 minutes.
07 -
Once cooked, take them out and serve hot.