
As that's the primary INGREDIENT
of baby powder...
The Big Bang Theory Season 4, Episode 21

and my favorite INGREDIENT
of all, uniformity.
The Big Bang Theory Season 5, Episode 24

I discovered
a secret INGREDIENT:
The Big Bang Theory Season 7, Episode 6

It's got a
secret INGREDIENT.
Breaking Bad Season 2, Episode 2

And finally,
its main INGREDIENT is paneer...
The Big Bang Theory Season 2, Episode 21