An Abundance of Brothers by D. K. Sutton

Two sets of identical twins mismatched at birth and raised as brothers.

Xander
Winning this baking competition will prove I can handle the pressure of running the family restaurant. But things go sideways right from the start. People I’ve never met act like they know me. Even my brother’s personality changes overnight. Add in a cute guy who hates me with a passion usually reserved for your worst enemy…and my ability to focus is severely tested.
I need this win, but we might not make it through the first round.

Dom
My focus is on helping Xander win and uncovering the truth about our past. But when my socially awkward brother changes overnight into a sexy beast of a man, I have bigger problems. How can my body betray me like this? These feelings are dangerous and wrong. And reciprocated.
Except, not all the time. My brother switches personalities like he does shirts—several times a day. Xander and I are out of sync and almost out of time.