Put the oats, nut butter, flour, syrup, oil and sugar in a large bowl. Mix until combined.
Add optional extras if using (or press on top once formed)
Depending on the consistency of your nut butter, you might want to let the mixture sit a bit to firm up. Once it's ready, scoop into balls and place apart on a lined baking tray. Press the balls down slightly to make cookie shapes (alternatively press into a cookie cutter to get uniform cookies).
Bake at Gas Mark 5 (375f /190c) for 10 minutes until the edges are just beginning to brown. Remove from the oven and allow to cool (they will firm up on cooling).