Where Did I Go Wrong?

Yesterday I was hankering for a bite to eat and I figured I would try this recipe for "Instant Mug o' Mac & Cheese".  I had almost all of the right ingredients and it looked so good.

The 3-2-1 Snack Cake, another mug dish, worked out just wonderful, so I was willing to give this a go.

What a mistake that was......
This looks great, right?  It was a pretty simple ingredient list: water, pasta, cheese, and milk.  I normally don't keep milk around the house so I used the appropriate amount of powdered milk.

My mug required an extra cycle of cooking, which I was forewarned about.  When it was ready for the milk and cheese, they went in and seemed to blend wonderfully.  The issue I had was that the cheese did melt, but it just formed a big glop of goo in the bottom of the mug.  I tried stirring it up, but it just stuck to the spoon.  I even put it back in the microwave for another minute, but nothing changed.

My lunchtime snack dreams went from this......

...........to this.  I doubt that it was the fact I used powdered milk, but I could be wrong.  I'm willing to give it another go next time I get groceries.

I just wish we could buy shelf-stable milk boxes like I used to get overseas.  That would have been perfect for this.