  We present a very minimal model for baryogenesis by a dark first-order phase
transition. It employs a new dark $SU(2)_{D}$ gauge group with two doublet
Higgs bosons, two lepton doublets, and two singlets. The singlets act as a
neutrino portal that transfer the generated asymmetry to the Standard Model.
The model predicts $\Delta N_\text{eff} = 0.09-0.13$ detectable by future
experiments as well as possible signals from exotic decays of the Higgs and $Z$
bosons and stochastic gravitational waves.
