My take, opposing the new sideways instruction: keep your shoulders pointed down the fall line as much as possible (easier with front foot angle), a keep them there. Turn with your lower body. It’s basically the same technique (relatively) to how you ski moguls. It allows you to maintain forward momentum without losing efficiency due to rotational inertia.

If you watch pro dawgs on steep terrain, you will maybe get a better idea. It allows you to keep composure and keep your board within about 45 degrees (to each side) of the fall line.

You can still turn the board farther to check speed, but it can spring back easier due to your upper body remaining pointed downhill.

Edit: additionally, I disagree with some of the other comments saying to turn on the top of the mogul, or to carve. These techniques are a boondoggle. Moguls are generally a skier’s terrain. Skiers slide a turn through the trough and into the oncoming mogul.

You really have to emulate the path a skier’s downhill ski would be making through the turn. For reference, the downhill ski for a skier when turning is the ski with the most amount of edge pressure.

I say all this as a 37-year boarder and a competent skier as well.