  In this article, we define a class of binomial ideals associated to a
simplicial complex. This class of ideals appears in the presentation of fiber
cones of codimension 2 lattice ideals \cite{hm}, and in the work of Barile and
Morales \cite{bm2}, \cite{bm3}, \cite{bm4}. We compute the reduction number of
Binomial extensions of Simplicial ideals. This extends all the previous results
in this area.
