1. Combine the plain flour, baking powder and baking soda in a bowl and set aside. 
2. Add the softened butter, light brown sugar, white granulated sugar, peanut butter and miso into Ooni Halo Pro’s mixing bowl, then with the silicone beater attachment, beat for 3 minutes at 70% (medium-high). Scrape down the sides of the bowl as needed, which you can do by holding a spatula against the side of the bowl while it rotates. 
3. Add the egg and vanilla extract, then beat for 1 minute at 40% (medium). 
4. Add all the dry ingredients and mix at 30% (medium-low) for 30 seconds to 1 minute until the dough comes together and the flour has been fully incorporated. 
5. Divide the cookie dough into 50g dough balls – you’ll have to scrape the bowl down with a spoon, but there will be enough dough for 16 cookies. Once rolled, coat the dough balls in the demerara sugar and place in a container or baking tray. It’s fine if they’re touching each other, as the demerara sugar will prevent any sticking. Leave them to chill in the fridge for a minimum of 2 hours. You can leave them in the fridge overnight, or freeze* if you prefer. 
6. When you’re ready to bake, preheat the oven to 350°F/180°C fan.
7. Place the cookies about 2 inches apart on a lined baking sheet and gently press them to flatten them slightly into discs that are approximately 2cm (¾ inch) thick. This gives you a more even bake that creates a chewier cookie. 
8. Bake for 13-15 minutes until the edges are lightly browned and the cookies have a crinkle top. You may need to rotate the baking tray after 8 minutes for an even bake, depending on the heat distribution in your oven. 
9. For a chewier cookie, tap the tray firmly on your counter as soon as the tray is removed from the oven. Leave to cool** and enjoy! 

Tips:

*You can freeze these for another time – just press the dough balls to flatten slightly before you freeze them. When you’re ready to bake, leave the dough balls out at room temperature for about half an hour to defrost before baking. 

** For a perfectly round cookie, when they’re fresh out of the oven use a round cookie cutter that’s slightly larger than the cookie. Place it around the cookie and move it in a circular motion.