To make a mini croissant out of polymer clay, you will need the following: polymer clay (tan), pastels, a paintbrush, and oil paint. Roll the clay into a ball. Next, roll it out into a log. Twist the ends. Next, shape the clay into a crescent moon shape. Use a paintbrush to dust yellow pastel onto your croissant. Start with a muddy yellow color pastels. You may need to layer the colors to get the best shade.
If you like, you can make your croissant to be representative of different recipes: e.g. chocolate croissants, cream cheese, etc. You could, for example, dip one end into brown paint to make a chocolate croissant.