I used malted milk powder in an ice cream recipe a few weeks ago. It's the first time I ever used it, and it came in a plastic zip-top bag from King Arthur. It is now hard as a rock- one big clump in the bag. It smells the same as before though- not bad, just malty!
Should I toss it, or should I keep it? I guess I could break off chunks as needed and whirl them back to powder in the food processor. Does malted milk powder normally harden like this?