1. First soften the butter, add powdered sugar, salt, and egg yolk in turn and stir well.
2. Sift the low powder and continue to use the cutting and mixing method to mix evenly.
3. After cutting and mixing evenly, it becomes large particles, and knead it into a dough by hand.
4. Divide the kneaded dough into three equal parts, put one part in a fresh-keeping bag and put it in the refrigerator, and divide the remaining two parts into three parts. Add the pigments and knead evenly, and wrap it in a fresh-keeping bag.
5. Use a rolling pin to roll the dough into pieces of the same size and thickness.
6. Dip the egg whites on the dough with a brush.
7. Glue the 6-color dough sheet layer by layer, cover it with plastic wrap and lightly compact it with a rolling pin, and put it in the refrigerator to freeze.
8. Use a heart-shaped mold to extrude the shape.
9. Brush each rainbow heart with egg whites and stick them together one by one. Each stick should be gently compacted and then frozen in the refrigerator until hard.
10. Then wrap it in the original color dough.
11. Brush the wrapped heart-shaped surface with another layer of egg whites, roll on the colored jelly beans to make the jelly beans evenly stuck on the surface, and then freeze until hard.
12. Take it out after freezing and cut into small pieces of uniform thickness.
13. Put it into the baking tray and put it in the oven at 175 degrees for about 20 minutes.
14. Beautiful rainbow cookies.
Tips:Don't knead the dough into a dough too much, as long as there is no dry powder, the dough must be compacted between each layer, and the baking time should be adjusted according to your own oven temperature.
