Tamalera at MexGrocer.co.uk, Online Grocery Store for Authentic Mexican food & Chillies - tamale steamer TAMALE STEAMER INSTRUCTIONS Fill tamale steamer with water to about half an inch from the bottom of the rack. Stand tamales closed end down on rack or basket in steamer. Bring to a boil, then steam over medium heat for one and a half to two hours or till masa is no longer doughy. Add water as necessary. Take one from the middle and try it to be sure it’s done before turning the pot off.