Right-sided defender Ingram, 19, came from the bench on the hour mark as the Young Lions swept aside Chile 3-0 in impressive style in a World Cup warm-up fixture in Spain.
Gloucester-born Ingram was a late call to Ian Foster's squad for a trio of clashes in the Costa Cálida Supercup in San Pedro del Pinatar in the south east of the nation. The tournament is acting as a warm-up for next year's under-20s World Cup in Indonesia.
And he wasted little time in earning a first cap at under-20 level – in a squad made largely from this year's under-19s European Championship winners – as Foster sent the Baggies youngster on for goalscorer Daniel Oyegoke for the final half hour with England 2-0 up.
Goals from summer Albion target Liam Delap, who instead joined Stoke on loan from Manchester City, MK Dons defender on loan from Brentford Oyegoke and new Southampton signing Sam Edozie sealed the win.
Ingram has previously made three appearances for England's under-17s and won one cap for the under-18s.
He could push for a first under-20s start in the coming days with Foster's youngsters set for further fixtures against Morocco on Saturday (5pm) and Australia next Tuesday (4pm).
Ingram made just a second senior appearance for Albion earlier this season as Steve Bruce selected the attack-minded full-back from the off in the Carabao Cup second round defeat at Derby, in which he played the first half.