and my favorite INGREDIENT
of all, uniformity.
The Big Bang Theory Season 5, Episode 24
What secret INGREDIENT?
Breaking Bad Season 2, Episode 2
It was always Sheldon's favorite.
You know what the secret INGREDIENT is?
The Big Bang Theory Season 1, Episode 4
As that's the primary INGREDIENT
of baby powder...
The Big Bang Theory Season 4, Episode 21
I discovered
a secret INGREDIENT:
The Big Bang Theory Season 7, Episode 6