Add water and pasta into an oversized mug that can hold at least 20 ounces of liquid. Place the mug on a large plate (this is to catch the overflow of water that occurs when cooking). Microwave for 1 minute, then stir, making sure noodles do not stick to each other or to the bottom. Microwave for an additional 1 minute and stir again. Microwave for an additional 1 minute (you should be on minute 3 now) and stir again. Noodles should be almost cooked at this point and most of the liquid should be gone. How much more you need to cook will depend on your microwave. I microwaved mine an additional 30 seconds.
While macaroni is cooking, place avocado in a small bowl and mash with a large spoon until only very small chunks remain.
If you have any remaining water in your mug, pour it out. Immediately add in cheese and stir until it completely coats the noodles. If you’re using very finely shredded cheese, it should completely melt. If you are using thicker shredded cheese, you may need to microwave for an additional 20 seconds and stir again before it’s uniform. Add in mashed avocados and mix in with macaroni. Add salt and pepper as needed. Eat immediately.