If I find myself needing breadcrumbs, it has become my habit now to just make my own using good bread (gluten-free in this case). Sometimes I will use organic fruit-sweetened cornflakes (Nature's Path) ground up in the food processor - this works well for some of my recipes (like meatballs). But if I really just need basic breadcrumbs I start with some good quality gluten-free bread in any amount (organic if you can)*.
Preheat oven to 300 degrees.
Cut bread into 2 inch squares.
Spread the pieces on a baking pan - they should be laid out in a single layer.
Bake on center rack for about 15-20 minutes.
You can turn each piece halfway through baking (a pain in the ass) or cheat like me, and just put the pan on the highest rack in the oven for the second half of baking.
If the pieces are sufficiently dry after that time, remove from oven and let cool.
You can bake longer if necessary.
Put dried/cooled pieces in a food processor and grind up to breadcrumbs. It is okay if it is not ground to a powder - some pea-sized pieces are fine.
A sprinkle of sea salt and a quick mix won't hurt.
Use in your favorite recipe as directed!
*My favorite gluten-free breads are the millet flax breads you can order online from Sami's Bakery.
True Story: For my Gluten-Free Lobster Mac-n-Cheese, all I had left in the freezer was a Sami's Bakery pizza crust and that worked out just fine as you can see in the photo above. You can also just skip this whole recipe and get some of their croutons and put them in the food processor too! I have also very successfully used their croutons for a delicious homemade gluten-free stuffing I make at Thanksgiving (I'll share that recipe when I get a chance). Basically, if you are going to place an order, stock up! You can freeze any of it for a later date - even the croutons. If freezing, stick the bags of bread in freezer bags for better protection from freezer burn.