Begin by preheating your oven to 200 degrees F to keep the onion rings warm after frying. Line a baking sheet with parchment paper and place it in the oven.
In a mixing bowl, whisk together the gluten-free flour, cornmeal, arrowroot powder, garlic powder, smoked paprika, sea salt, black pepper, and cayenne pepper if using.
Pour the almond milk into a separate bowl. This will act as the ‘glue’ to help the dry mixture stick to the onion rings.
Take an onion ring and first dip it into the dry mixture, ensuring it’s fully coated. Dip it into the almond milk and coat it again in the dry mixture. Place the coated onion ring on a plate and repeat with the remaining onion rings. One quick tip, keep one hand for dry ingredients and the other for wet to avoid clumping.