The mimetic polyalloy, as its name suggests, allows a Terminator to change into any shape or form that it touches, provided that the object is of similar mass.
Ahnold with one of those white mushroom hats and an apron.
Puts the tray of confections in the kitchen counter - "Ah'll be back..."... returns with one of those cones with a bag that squeezes out vanilla cream custard.
This just reminded me of the scene with the T-1000 posing as John's foster mother, which was a really great scene, but it meant he was literally just standing there cooking dinner waiting for John to come home or call lmao.