For different flavors you can very easily sub out the vanilla for other flavorings and emulsions! I would recommend starting with 1 to 1 1/2 teaspoons instead of a tablespoon as they have different potencies. You can also use spices as flavorings! Again, start with 1 teaspoon because they do go further. When coloring my royal icing I prefer Americolor gels because they are much more pigmented and last much longer!