Line a baking sheet with a silicone mat or parchment paper
In a large bowl, mix together the peanut butter, banana, oats, peanut flour, cinnamon, and turmeric with a wooden spoon until well combined
Place the mixture on the prepared baking sheet, cover with plastic, and spread evenly using your hands to a thickness of ⅛ inch / 6mm
Freeze until firm, about 15 minutes. Preheat the oven to 350°F / 175°C
Use a 3½-inch / 9cm bone-shaped cookie cutter to shape the dough. If it gets sticky, return it to the freezer until firm, about 5 minutes. Gather any scraps and use for training treats
Spread the cut cookies on the same baking sheet and bake for about 15 minutes, or until golden brown