The phase behavior of mixtures of water, alkyl ethylene glycol ethers (CkOC2OCk) and n-alkyl beta-D-glucopyranosides (C(m)G(1)) is systematically reported as a function of temperature and composition. Previous work has shown that C(m)G(1) are nearly insoluble in alkanes, and ternary mixtures of water-alkane-C(m)G(1) produce stable emulsions. Replacing alkanes with more hydrophilic alkyl ethylene glycol ethers increases the solubility of C(m)G(1) in the oil. The well-known 2-3-2 phase sequence is observed in water-CkOC2OCk-C(m)G(1) mixtures with increasing temperature, indicating that C(m)G(1)’s partition into the oil at higher temperatures. This microemulsion phase behavior closely resembles that of mixtures made with water, oil, and other nonionic surfactants, e.g., n-alkyl polyglycol ethers (CiEj), and both tricritical phenomena and general patterns of phase behavior are observed.