Tested this recipe today. Made my own kosher for Passover powdered sugar by blending 2/3 cup sugar with 1 tsp potato starch in a food processor for 2 minutes so I'd have a supply. I made a half-batch plain, and a half-batch with the cocoa powder (not the pistachios). I made the criss-cross on all the cookies except two of the plain ones, which I made as thumbprint with strawberry preserves. Each of my half batches made 7 cookies, and took 11 minutes. (Possibly they were a bit larger. I used a #70 scoop.) Very pleased with the results. I plan on making the basic recipe for Passover, 1/3 of them thumbprint. Thanks, KAF!!

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