It's time to add shadow. Hold shift and Ctrl+click all coffee thumbnail layer to select it. Nudge the selection by pressing up and right arrow a few times. Fill it with black, add Gaussian Blur, then lower the opacity to 50%.

We're done creating the coffee. Let's tidy up the layers. Select all the layers and hit ctrl+G. This will automatically put every layers in a group. Name this group coffee and click eye icon to hide it. Next, we'll focus on creating the paper napkin.
(a) Using rectangular marquee tool, create a selection for the paper. (b) Press Q to enter quick mask mode. (c) Click Filter > Pixelate > Crystallize. (d) This filter will create torn edges effect to the selection. (e) Again, hit Q to return to normal mode.






Click Filter > Texture > Texturizer. Use Texture: Canvas with Relief: 1 then click OK.

The paper is too clean, not so realistic. We need to make it darker and a bit dirtier. To do this, paint it using burn tool. Make sure you use low exposure and paint repeatedly to have gradual and subtle effects.
