Not easy for an English speaker.
Pronounce it like back, but with a voiceless velar fricative replacing the ck sound in back. To do this easily, you can either pronounce it with the front of the mouth and say the ck sound, but leave a small gap between the tongue and the roof of the mouth, or you can pronounce it in the throat by rolling an R but leaving it unvoiced. (To see the difference between Voices (rolled R) vs unvoiced (strong ch sound in scots), compare F and V, Th as in Bath and Th as in Thin, Sh vs J as in Bonjour, S vs Z, etc.)
I've included an audio recording in the related links.
BAYCH (hard CH not BAISH) Positively not BATCH
Richard bache
Jules Bache was born in 1861.
Kaare Bache died in 1978.
Kaare Bache was born in 1888.
Thomas Bache died in 1843.
Samuel Bache died in 1876.
Samuel Bache was born in 1804.
Øystein Bache was born in 1960.
Richard Bache died in 1811.
Harold Bache died in 1916.
Walter Bache was born in 1842.
Walter Bache died in 1888.