Few simple steps.
1)New document (512x512)
2)Fill it with 8e611a
3)Now select brush Diameter 50 Opacity 100 and paint few brown dots (302108)
4)Go to filter/Noise/Add noise (20,uniform,monochromatic)
5)Filter/blur/motion blur and use 6
6)Filter/noise/add noise (20,uniform/monochromatic)
7)Again filter/blur/motion blur and use this time 12
This is final result:
Oh,for better result use some highlights and shadows around dots