  At a discrete set of magic angles, twisted bilayer graphene has been shown to
host extraordinarily flat bands, correlated insulating states, unconventional
superconductivity, and distinct Landau level degeneracies. In this work, we
design a highly efficient quantum Otto engine using a twisted bilayer graphene
sample. Flat bands, which occur at magic angles, make the prospect of
extracting useful work from our Otto engine lucrative. We use an eight-band
continuum model of twisted bilayer graphene to compute efficiencies and work
outputs for magic and non-magic angle twists, and compare the results with an
$AB$ stacked bilayer and a monolayer. It is observed that the efficiency varies
smoothly with the twist angle and the maximum is attained at the magic angle.
