This experiment examined the effect of feeding graded levels of Momordica foetida leaf (MFL) as a substitute for Noug Seed Cake (NSC) on feed intake, digestibility, growth performance, and economic efficiency. Forty-two yearling lambs (16.1±0.6 kg) were randomly allotted to six dietary treatment groups for 90 days feeding trial followed by ten days digestibility trial. Treatments were T1(Control) = adlibitum PG (Pennisetum glaucifolium) + 449.3gm WB (Wheat Bran), T2 = 449.3gm WB + 100% MFL; T3 = 449.3gm WB + 75% MFL + 25% NSC; T4 = 449.3gm WB + 50% MFL + 50% NSC; T5 = 449.3gm WB + 25% MFL + 75% NSC; T6 = PG + 449.3gm WB + 0% MFL + 100% NSC. Data were analyzed using SAS's General Linear Model (GLM) procedures (version 9.4, 2019). The result indicates that the increasing level of MFL had no significant effect on basal dry matter intake. The apparent digestibility of DM was higher (P<0.001) in T1 (60.5%) and T6 (62.5%); a higher (P<0.001) average daily gain was recorded for animals in T6 (171.0g/d). The cost-benefit analysis revealed that T5 has a good and optimum final body weight gain (30.5kg), 765.5 ET/head total return, and 381.1 ETB/head net return. It was concluded that 25% inclusion of MFL in the diet increases nutrient intake, weight gain and economic efficiency in Bonga sheep.