IHOP for a limited time this January.
Available only on the chain's signature buttermilk pancakes, they can be ordered as either "just pancakes" or as part of a combo with the standard breakfast fixings (various combinations of egg, sausage, bacon, hash browns, etc.).
If you order "just pancakes," they'll bring 'em out to you in stacks of 5 at a time, while getting all-you-can-eat pancakes as part of a combo has your server bringing a more moderate two buttermilk pancakes at a time.
The offer is only good through Monday, January 27, 2014 at participating IHOP restaurants.