Eupithecia cabrasae is a moth in the Geometridae family. It is found in the region of Biobio (Nuble Province) in Chile. The habitat consists of the Northern Valdivian Forest Biotic Province. The length of the forewings is about 8 mm for females. The forewings are greyish black, with a grey median area outlining a triangular dark area on the costa enclosing a black discal dot of raised scales. The hindwings are slightly paler than the forewings, becoming darker distally. Adults have been recorded on wing in December.