I thought I would share how I add batting to a simple cotton and minky baby blanket that is made by turning, rather than adding binding around the edges.
After cutting out the front and back fabric to the size you need, just layer the three pieces together: top fabric (face down), minky (face up) and batting. I put them in that order from top to bottom so that I can follow the edge of the top fabric when I'm sewing. Pin the three layers together and sew, using the top fabric as your guide and leaving a hole to turn. After they've been sewn, trim off the excess.
Then turn the blanket and the batting will be on the inside.
From here I trim the batting to be even with where the "edge" of the blanket will be. Then I fold up the minky to cover the batting (that way when I top stitch it will get sewn down) then I fold the top fabric under as well and pin closed.
Then I just top stitch all the way around, which closes up the hole and secures that little bit of batting.
Since batting shifts easily in the wash and bunching is never welcome, I quilt it. I figure out where I want my quilt lines, you can do it as heavily or as lightly as you want/need to fit your style.
Then I stitch down the rows. This pattern was easy to quilt but if the pattern is more random I make lines to follow and in this instance I chose to use a walking foot. I've done it without the walking foot and it was fine but it does make it easier due to the thickness with the batting.
Hope everyone has a good weekend!