If you can't find MixIt Universal GF flour mix by Schar, you can use another GF flour mix of choice. Just make sure it's a GF flour blend and nut just a simple GF flour. Also, if you try this pizza crust recipe with regular all-purpose flour containing gluten, it may not work. Gluten makes the crust more elastic and it may not have the same texture, so the technique cannot be applied.