water biscuit

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A biscuit made of flour and water.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A type of biscuit or cracker which is baked using only flour and water, without shortening or other fats. In the US, often called a water cracker.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a thin flour-and-water biscuit usually made without shortening; often served with cheese