A turbine engine component comprising: a wall extending from a leading edge to a trailing edge, the wall including a hot side surface for facing a gaspath when installed, and a cold side surface opposite said hot side surface; at least one minicore cooling circuit (190; 390) disposed between said hot side surface and said cold side surface within said wall; at least one cooling fluid inlet for connecting a trailing edge plenum of the at least one minicore cooling circuit (190; 390) to a coolant source wherein the at least one cooling fluid inlet is at least one impingement cooling fluid inlet; and a plurality of film cooling holes connecting said at least one minicore cooling circuit (190; 390) to said hot side surface, wherein the at least one minicore cooling circuit (190; 390) includes a leading edge plenum having a thickness normal to the hot side surface that is larger than a thickness of the majority of the at least one minicore cooling circuit (190; 390) normal to the hot side surface, the leading edge plenum (316; 418) being a portion of the at least one minicore cooling circuit (190; 390) most proximate to the leading edge, wherein the leading edge plenum is configured to reverse a flow direction of a coolant passing through the at least one minicore cooling circuit (190; 390), wherein the trailing edge plenum has a thickness normal to the hot side surface that is larger than a thickness of the majority of the at least one minicore cooling circuit normal to the hot side surface, the trailing edge plenum being a portion of the at least one minicore cooling circuit most proximate to the trailing edge, wherein at least one of the film cooling holes connects the leading edge plenum (316, 319) to the hot side surface characterised in that: another at least one of the film cooling holes connects the trailing edge plenum (316, 319) to the hot side surface. a wall extending from a leading edge to a trailing edge, the wall including a hot side surface for facing a gaspath when installed, and a cold side surface opposite said hot side surface; at least one minicore cooling circuit (190; 390) disposed between said hot side surface and said cold side surface within said wall; at least one cooling fluid inlet for connecting a trailing edge plenum of the at least one minicore cooling circuit (190; 390) to a coolant source wherein the at least one cooling fluid inlet is at least one impingement cooling fluid inlet; and a plurality of film cooling holes connecting said at least one minicore cooling circuit (190; 390) to said hot side surface, wherein the at least one minicore cooling circuit (190; 390) includes a leading edge plenum having a thickness normal to the hot side surface that is larger than a thickness of the majority of the at least one minicore cooling circuit (190; 390) normal to the hot side surface, the leading edge plenum (316; 418) being a portion of the at least one minicore cooling circuit (190; 390) most proximate to the leading edge, wherein the leading edge plenum is configured to reverse a flow direction of a coolant passing through the at least one minicore cooling circuit (190; 390), wherein the trailing edge plenum has a thickness normal to the hot side surface that is larger than a thickness of the majority of the at least one minicore cooling circuit normal to the hot side surface, the trailing edge plenum being a portion of the at least one minicore cooling circuit most proximate to the trailing edge, wherein at least one of the film cooling holes connects the leading edge plenum (316, 319) to the hot side surface characterised in that: another at least one of the film cooling holes connects the trailing edge plenum (316, 319) to the hot side surface.