  Twisted bilayer graphene has recently attracted a lot of attention for its
rich electronic properties and tunability. Here we show that for very small
twist angles, $\alpha \ll 1^\circ$, the application of a perpendicular electric
field is mathematically equivalent to a new kind of artificial gauge field.
This identification opens the door for the generation and detection of
pseudo-Landau levels in graphene platforms within robust setups which do not
depend on strain engineering and therefore can be realistically harvested for
technological applications. Furthermore, this new artificial gauge field leads
to the development of highly localized modes associated with flat bands close
to charge neutrality which form an emergent Kagome lattice in real space. Our
findings indicate that for tiny angles, biased twisted bilayer graphene is a
promising platform which can realize frustrated lattices of highly localized
states, opening a new direction for the investigation of strongly correlated
phases of matter.
