Slow Cooker Chocolate Banana Steel Cut Oats

cooking spray

10 cups water

2 cups steel-cut oats

2 pounds ripe bananas, mashed

½ cup unsweetened cocoa powder

⅓ cup granular no-calorie sucralose sweetener (such as Splenda®)

Lightly spray a 5-quart or larger slow cooker crock with cooking spray.

Mix water, oats, mashed bananas, cocoa powder, and sweetener in prepared slow cooker.

Cook on Low for 6 hours.