  We study electroweak baryogenesis driven by the top quark in a general two
Higgs doublet model with flavor-changing Yukawa couplings, keeping the Higgs
potential $CP$ invariant. With Higgs sector couplings and the additional top
Yukawa coupling $\rho_{tt}$ all of $\mathcal{O}$(1), one naturally has sizable
$CP$ violation that fuels the cosmic baryon asymmetry. Even if $\rho_{tt}$
vanishes, the favor-changing coupling $\rho_{tc}$ can still lead to successful
baryogenesis. Phenomenological consequences such as $t\to ch$, $\tau \to
\mu\gamma$, electron electric dipole moment, $h\to\gamma\gamma$, and $hhh$
coupling are discussed.
