What is claimed is:
1. An expanded matrix, comprising a mixture of starch comprising amylose and amylopectin, and clean lignin, the lignin being present in a % weight ratio of from about 1:99 to about 50:50 of the starch, the expanded matrix having a uniform distribution of cells throughout.
This application claims the benefit of U.S. Provisional Application No. 62/293,464, filed Feb. 10, 2016, which application is incorporated herein by reference in its entirety.