Follow the steps below and watch the video tutorial:
CREATE AN EGG SHAPE
Fill the background of any colour you like (colour used in the tutorial: #fffffc). Use the Ellipse Tool and draw a circle. Fill the circle of any colour you like.
Go to Edit–>Transform–>Wrap.
Click on the top of the circle and holding the button move the mouse up:
ADD EGG PATTERN
Create the new layer. Use Pen Tool and draw kind of broken shell/ zigzag shape.
Right click on the path and select Make Selection…
Press Shift+Delete (in Mac OS) to fill the path (used colour in the tutorial: #fefae0). Use the Pen Tool again and draw a similar path on the top of the egg. Fill the path.
Create a new layer. Draw a triangle shape by using the Pen Tool in the middle of the egg. Fill the triangle (used colour in the tutorial: #ef6f51):
Create a new layer. Draw a second triangle shape by using the Pen Tool on the top of the first triangle. Fill the triangle (used colour in the tutorial: #f4a261).
Create a new layer. Use the Ellipse Tool and draw two flat circles:
Create a new layer. Use the Ellipse Tool and draw two circles (used colour in the tutorial: #ffb4a2):
Create a new layer. Use Rectangle Tool and draw a square. Fill the square (used colour in the tutorial: #f2cc8f). Drag this layer at the bottom of the Shell/ Zigzag path.
Hide the background and the egg layer by unticking the eyeballs in the layer panel. Right-click on the Rectangle layer and select Merge Visible.
Make an egg layer visible (click on the eyeball).
Create Clipping Mask: Hold down Alt (Option in Mac OS), position the pointer over the line dividing two layers(rectangle layer and the egg layer) in the Layers panel (the pointer changes to two overlapping circles), and then click.
Merge the visible layers:
Change the colour of the background (used colour in the tutorial: #8ecae6). Use the Ellipse Tool and draw the flat circle in black:
In the Layers panel, reduce the opacity of the circle to 20%:
Right-click on the rectangle layer and select Blending Options…:
Tick Inner Shadow and set the opacity to 40% and the Blend Mode to Multiply:
Easter Egg is ready!
Watch also the video tutorial: