Step 1-Sew the mug rug in a 9 patch formation as shown below and the coaster in a 4 patch formation.
Because it holds both the tea and the cookies!
You could make one for Santa!
Is there a better reason?
Admire your efforts!
PS. I used Hobbs Heirloom Batting because it lays nice and flat, especially on small projects and you could also use Fusible Hobbs Heirloom