Cook time of the pasta could vary depending on your microwave. Test a piece of pasta for doneness when it comes out after that initial 4 minutes – it should be al dente. If it’s not, pop it back in the microwave for thirty second intervals.
Depending on your mug, you might have a little bit too much water left over in your pasta when it comes out of the microwave. If there is any water pooling in the mug, spoon or drain it out before adding your half and half + cheese.