Soybeans are another excellent source of magnesium. About ½ cup cooked soybeans will meet approximately 20 percent of your daily magnesium needs. Edamame--plain steamed soybeans--make a great snack. You can incorporate them in to salads and stir-fries for added protein and texture. For a delicious and different twist on a classic Middle Eastern dip, try our Soybean Hummus recipe.