Decorating flowers is a common skill in baking cakes and desserts, and beginners need constant practice to master it. Here are some exercises that beginners can try:

1. Prepare the piping bag and piping mouth: It is very important to choose the appropriate piping bag and piping mouth. Beginners suggest choosing a round piping with a moderate size.

2. Prepare practice materials: It is recommended to practice with cream or light cream. Butter or whipped cream needs to be foamed in advance and put in a piping bag.

3, practice decoration: first practice on the cake mold or baking paper, practice with different decorative nozzles to make different shapes of decoration. First, you can choose simple shapes, such as lines, arcs and circles.

4. Keep practicing: the initial decoration practice is difficult to be perfect, and it needs to be constantly tried and improved. You can find some videos on flat screen TV or computer to learn how to decorate flowers.

In short, beginners need to keep practicing and learning, and master the basic decoration skills in order to make beautiful cakes and cakes.