How to make flowers with frosting?

What type of icing is used to make flowers?

To make the royal icing:

4 cups powdered sugar. 3 Tablespoons meringue powder. 6-9 Tablespoons room temperature water. Wilton gel coloring (yellow for center of flowers + any other colors you want)

How do you make icing step by step?

Method

1. Put the butter into a large bowl and beat with an electric hand mixer until light and fluffy.
2. Sift in the icing sugar, then work it into the butter, starting slowly at first, then beating more vigorously once all the sugar is combined.
3. Add the milk and the vanilla, then beat until creamy and smooth.