Elachista granosa is a moth of the Elachistidae family that is found in Utah. The length of the forewings is 4.9–5.9 millimetres (0.19–0.23 in). The basal 1/5 of the costa of the forewings is brownish grey. The ground colour is white, irregularly powdered with dark brown tips of scales forming very indistinct streaks in the middle of the wing at the fold and at 2/3 of the wing. The hindwings are translucent and light grey and the underside of the wings is light brownish grey.