Measure out the parchment paper to the width of the longest side of the pan (in this case, it’s even). Make sure it’s long enough to line the entire bottom of the pan, both sides and have a few inches of overhang on either side.
To make cashew flour, pulse raw cashews in a food processor, a few seconds at a time, until they resemble a coarse flour. You don’t want any visible chunks of cashews. This should take about 1 minute.
These also taste absolutely fabulous straight out of the refrigerator or freezer!