This pattern?
http://www.strictlypetsupplies.com/_...k-Party-Series
(and for the life of me I have NO idea why the Google search resulted in a link to a pet supply site.) :roll:
You're talking about the Snowball blocks, right?
The other way to make them is to cut the center square (Fab#1), cut 2 other squares (Fab #2 & #3) and cut them in half on the diagonal, and then sew those triangles to the four sides of the center square, to make a Square-in-a-Square block.
Personally, I prefer the Snowball route (a pretty standard technique)...I don't EVER have to deal with triangles and a bias edge (not even if it's inside).
And, btw, I only trim the underside of the smaller squares --- I always leave the center square corners intact. And I toss those little cut pieces. Others sew them together or use them as leaders.
The added layer in that part of the block causes no problems or issues (maybe it would if you were hand quilting), and actually causes less distortion in the block by keeping it square.
So, to answer your original question, in this case, I would have done it exactly as the pattern instructed. :lol: