Our entire line of cubes are made solely from natural ingredients; Colombian Coffee and raw cane sugar, nothing more.
We are in the process of finalizing certification for the Coffee Cubes and that should be done before the cubes are delivered (hopefully). This certification is being done through http://www.koshercolombia.org/. We don't want to be misleading but, we have begun the process and our manufacturer only produces coffee, cacao, and sugar (without any chemicals), naturally kosher items. Even the freeze-drying process we use to make the coffee instant is deemed kosher by the certification companies we have checked with.
The extracts we use for the flavored cubes are certified Kosher. They are sourced from Natures Flavors in the U.S. and they are USDA certified Organic, gluten-free, vegan as well as Kosher. Kehilla Kosher oversees their certification and you can reach their site here: http://www.kehillakosher.org/