Dried beans. If you are using dried beans (around 350g), soak them in plenty of cold water with a teaspoon of baking soda overnight. Drain the beans and put them in a saucepan and cover with fresh cold water. Bring to a steady boil over medium heat, skimming off sediment as it rises to the surface. Cover and cook for 45 minutes - 1½ hrs until tender, then drain. The time will depend on how old your dried beans are.