Fun Fact of the Day – Kit Kats are made of Kit Kats. The manufacturers leave no Kit Kat uneaten, so every rejected Kit Kat is mashed into a paste that’s used to fill the wafers. Because every imperfect Kit Kat was at one point another imperfect Kit Kat, and the Kit Kat that is being created may also be rejected, every time you eat a Kit Kat, you’re basically eating a layer of Kit Kats within a Kit Kat within a Kit Kat.