Combine the Caputo Fioreglut, brown rice flour, instant yeast, milk powder, sugar and salt in a large mixing bowl.
Add the warm water and olive oil. Mix thoroughly with a dough whisk or wooden spoon until the dough becomes smooth. It will initially be wet and slightly lumpy, but the flour will gradually absorb the liquid.
Scrape down the sides of the bowl and gently shape the dough into a ball. Cover with a clean kitchen towel and leave to rest for 10–15 minutes.
Line a baking tray with parchment paper and lightly sprinkle with cornmeal, if using.
Lightly flour your work surface or grease it with a little oil to prevent sticking.
Divide the dough into 6 equal portions, approximately 65 g each. Gently roll each portion into a breadstick about 18 cm long.
Place the breadsticks on the prepared baking tray, leaving space between them. Cover with a clean kitchen towel and leave to rise in a warm place for approximately 20–30 minutes, until about 20% larger.
Once the breadsticks begin to look puffy, preheat the oven to 205°C (conventional, top and bottom heat), with the rack in the middle. By the time the oven is fully heated, the breadsticks should have increased in size by approximately 40–50%.
Bake for 10 minutes.
Meanwhile, melt the butter in a small saucepan over medium-low heat. Add the garlic powder, dried parsley and salt. Cook for approximately 1 minute, until fragrant, then remove from the heat.
After 10 minutes, remove the breadsticks from the oven and generously brush with the garlic butter.
Return to the oven and increase the temperature to 230°C. Bake for another 5–8 minutes, until golden brown.
Remove from the oven and place the baking tray on a cooling rack. Immediately brush the breadsticks again with the remaining garlic butter for a soft, shiny crust.