Don't Get Cheesed.
Get a Brie-lliant Game Tip here.
Cheese to Use in the Mousoleum
Radioactive brie is the most effective cheese for luring mice in the Mousoleum.
To make radioactive brie, you need to get dropped potions from the mice in the Lab.
One potion converts 30 Super Brie to 30 Radioactive Blue, no cost
One potion converts 5 Brie to 5 Radioactive Blue, but costs 300 gold per piece of cheese, so for one potion, 1500g [thanks Joanna]
Normal Brie can be used but with poorer results.