How to make a three-dimensional three-layer paper cake is as follows:

1. Fold the square of paper in half and unfold it, leaving a crease.

2. Fold the bottom and top edges of the square toward the crease.

3. Using your hands, unfold the top edge of the square and fold down along the center line to create an equilateral trapezoid.

4. Using your hands, unfold the bottom edge of the square and fold it up along the center line to create an equilateral trapezoid.

5. Fold the excess corners inward to fold out a small square.

6. Fold both sides of the small square along the diagonal and unfold, leaving a crease.

7: Using your hands, open the small square upward and fold it inward, along the crease, to create the diamond shape.

8. Turn the origami model over and fold the four corners of the square inward.

9. Fold the corners of the four rhombuses inward, and then fold the corners of the rhombuses upward once more.

10, use the same steps above to make another origami model.

11: Overlap the two models and fix them with glue. Tip: Place the two models on top of each other and fold the four corners inward over the other model.

12. Open up the eight inward-folded corners and flatten them to form a three-dimensional arch.

13, take a square of one-sixth the length of the original paper, fold it diagonally and unfold it, leaving a crease.

14, fold both sides diagonally and fold the small triangle below up.

15.Make 8 identical mold-making pieces in the same way.

16: Fix the 8 triangles vertically on the bottom with glue to form a jagged shape.

17: Take two thirds of the length of the original square of paper and make two more models using the same method as steps one through nine

18: Stagger and overlap them and fix them together with glue.

19, using the method of step twelve to fold the triangle inside to create an arch.

20.Fold down the corners of the eight diamond shapes.

21, interlock and overlap with the serrations on the bottom edge and secure with clear tape.

22, according to their own preferences can be added to the surface of the decorations, such as rose flowers, candles and so on.

In this way, the three-dimensional three-layer paper cake is completed.