Xanthosoma maffafa Schott (XMS) is under-utilized cocoyam whose tuber and leaf have potential nutritional and functional benefit. This study evaluated the effect of sun and solar drying on the proximate, mineral and anti-nutritional content of XMS tuber and leaf. The result of the proximate composition showed significant (p<0.05) differences for moisture (5.70 – 7.20%), ash (2.10 – 7.80%), fat (0.90 – 6.40%), fibre (2.60 – 8.60%), protein (6.38 – 20.93%) and carbohydrate (49.38 – 81.83%) contents. The sun and solar dried leaf had 3-fold ash, 6-fold fat, 3-fold fibre and 3-fold protein than the sun and solar dried tuber sample. The mineral content ranged for calcium (151.93 – 204.73 mg/100g), magnesium (71.02 – 120.25 mg/100g), phosphorus (18.3 – 43.89 mg/100g), iron (4.70 – 7.89 mg/100g) and zinc (2.78 – 4.60 mg/100g), with the leaves having higher values than the tuber irrespective of the dying method. For anti-nutrients, the result showed significant variations. Tannin, phytate, phenol, oxalate and HCN ranged as follows: 0.55 - 1.11 mg/100g, 0.14 – 0.48 mg/100g, 0.22 – 0.43 mg/100g and 0.20 – 0.40 mg/100g, respectively. The leaf showed higher values of anti-nutrient compounds for both processing methods. The overall result revealed that XMS leaf is a richer source of nutrients than the tuber and that solar drying was preferred to sun drying not only for nutrient quality, but for better hygienic XMS products. Keywords: Xanthosoma mafaffa Schott flour; Leaf powder; Sun drying; Solar drying; Nutrient quality; Anti-nutrients,