Toast the vermicelli: Melt 2.5 tablespoons butter in a medium pot over medium heat. Add 0.5 cups vermicelli noodles, broken into small pieces and stir constantly until deep golden brown, about 4 minutes. Watch closely, it goes from perfect to burnt fast.
Add the bulgur: Stir in 2 cups coarse bulgur wheat and mix thoroughly so every grain is coated in butter.
Add broth and salt: Pour in 4 cups chicken broth and stir in 1 teaspoon of salt.
Cover and simmer: Put the lid on and cook on low for 20 minutes, until all the liquid is absorbed. Keep an eye on it near the end so it doesn't stick, but do not stir while it cooks.
Rest and fluff: Remove from heat. Stir in a little extra butter or oil if desired. Fluff with a fork and serve.