I love King Arthur Flour. They stock the best cooking equipment, and their flours are high quality and reliable. I also have a Pavlovian response to their cinnamon buns.
But… my appreciation is deepened every time I find valuable resources – tiny treasures for bakers – hidden in their website. Today, it was a table of how to thicken fruits for pie using flour, corn starch, tapioca, sure gel, and their branded “Pie Filling Enhancer.”
https://www.kingarthurflour.com/learn/guides/pie-thickener
I used the table to make cherry pie filling for some cherry turnovers. And (oh darn!) I made too much and had to freeze some for pie later.